Demand goes down as age goes up, so by and large I've found both pros and sugar babes to be less expensive as they get older.  Also less flakey and more accommodating than their younger sisters.  Of course that is just on average.  Any individual can be an outlier.
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I met a bikini body builder SB who claimed to be 26.  But her real life info was easy to find on competition websites.  She was actually like 46.  She was petite, not muscle bound, but had stamina like crazy.  Easy to get along with.  Willing to meet whenever.  Prompt.  
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I really don't have anything to say bad about older women.  All women are crazy. But some tend to mellow a bit with age.

...so that's as close to 40 as I have experienced. But she seriously could have passed for 26, that's how good her body was.  And she had 2 kids!  Never would have guessed.  She was much busier than the younger ones I usually date.  She had a demanding job, tons of responsibilities at home, etc.  So her schedule was tight. As in, meet me on my lunch hour from 12:30 to 1:25.  But she always showed up on time, was very appreciative of my companionship, and was happy to receive the modest $ugar I offered her.

In a perfect civilian  world I would prefer a 40 something but the SB world is different. I responded so I’m waiting for her response. Please keep the feedback coming.

I have met three over 40. They were all sex maniacs, very skilled in bed and sure know how to pleasure a man. Our BCD sessions would last close to three hours (with a few breaks of course so I won't have a heart attack), and they usually wear me out at the end. Nowadays, if a woman knows how to take care of her body and skin, they can look 10 years younger. A lot of them are professionals and do this mainly to supplement their incomes. They are dependable, on time, and not flaky like many 20-something coeds. My sweet spot is late-twenties to mid-thirties, but I have no problem seeing 40-something MILFs.

I've sugar dated in all of these age groups.  All were hot, sexy, passionate lovers.  Most of them IMO had as much desire for the BCD time as I did.  Granted, I'm an old fart, and these gals were all youngsters to me.  As to how much?  If you've had your toe in the sugar world you know that SB expectations can run the gamut, and age doesn't seem to change that.  Fish with a budget in mind and stick to it.

One was extremely fit her body was awesome. She was not expensive but definitely bi polar.

The other was from Ukrainia. Loved to fuck and liked my dick inserted everywhere.  She eventually asked me to stop giving her money. Too bad she moved.

My experiences with SB's 40+ has been awful, though I've not been there very often.  One was a single mother of 2 who said 30 on her profile, but when you did the oldest kid math (18) had to be closer to, if not over 40. She was way too quick to offer BBFS and made a point of telling me she wouldn't mind knocking out another brat while she still could - with a well-off partner of course.  

 
Another said she was 42, but when we met for dinner, looked closer to 50. She was an east European buy-a-bride in the 80's who divorced after 10 years, took most of his money, had two older, estranged kids, and wanted me to provide "tough guidance" to them AND take care of her hair, nail, shopping, 2 year old Mercedes, and her Bel Aire apartment. I got all that in the 1st 15 minutes of our wine-bar dinner date. In  the next 15 minutes, she told me all the things about me that she would "fix." Horrified, I excused myself to pee and, for the 1st and only time in my life, I tapped the waiter by the kitchen, paid the bill + a tip and bailed out the back door.  I can't prove it, but I think that saved my life - because I would have ended up in the chair if I had not escaped her.  

 
The third was an Asian spinner that also had 2 pre-teen kids.  She was fun BCD, but every time I offered to do something expensive, like a steak dinner, or buying her nice things, she asked me to just give her the money instead so she could spend it on kid necessities. She even asked me to buy presents for her kids. Admirable dedication on her part to her children, but a Sugar buzzkill for me.  

 
So IMO the issue, of course, is children. I get it. Once you have a kid, your life must be reprioritized for them. In fact, I support that priority.  Having children is not a casual activity, and it requires that everything you do is done for their benefit. That's why I don't have any. I'm not done having hedonistic fun - and I won't be until I stop breathing.  

 
I imagine that without kids, or with grown and living-on-their-own kids, SB's 40+ can be as much, if not more fun than the 19-29 year old sweet spot where I play.  I expect they are more reliable, more relatable, more experienced in bed, less dependent, and have more reasonable expectations about allowance. But I've not found any of those older Unicorns yet.  (Probably because I'm not looking....).  

 
Life is good

 
The Cat

40+ is not normally something I look for 18-25 is more like it, but I connected with a SB on SA who said she was 30 and would bring along a friend who was also 30.  When I met her and her friend, I knew the y weren’t 30, but it wasn’t until I learned their real names that I discovered that they were both exactly 10 years older than that. The friend dropped out after a few visits since she was too unreliable.  My SB is an RN with grown kids. She’s reliable, not demanding, and has great skills. She has had extensive plastic surgery and looks great for her age. She has a boyfriend and is fine with PPM.  She’s been in my rotation for  three years now and there has been no pressure from her to change the arrangement.  

Currently have a low 40’s that I see regularly (hopefully not the same one as you lol). She’s very petite and in great shape (yoga every day). I’m typically in the 20’s and 30’s so was a little skeptical at first but she has been an absolute blast. We always spend a few days together. Very open from a sexual standpoint and someone that I really enjoy spending  time with outside the bedroom. A few months back, I may have had a different answer but I seem to have struck gold. My advice, go for it and see. Worst case is you meet and you blow a few hours of your time.

I continue to see a hot 40 year old - that I just can’t give up. She is a blonde barbie type, 5’11” - nice fake but proportionate tits and nothing else is fake. Solid 7-8 in looks and her body is a perfect 10, centerfold material. When I am with her, and she takes her clothes off, I really can't believe I am with her - lol. She has moved 100 miles away since I first met her but I will still drive 2 hours to see her at least once a month. Just can't give it up and the donation is reasonable.  

The BCD time with her is good - not great, but I do think if I saw her more often, the sex would get even better. I am sure others have had similar woman from the sugar bowl - you know the one’s that just do not fit the SB profile? Part of the allure of the sugar world to me is that you just never know what you will “pull out of the pickle barrel”- lol. Still a lot of work to find gems, but when you do, it's so worthwhile. And I am always quality over quantity, but I know others approach it differently.  

So young woman can be fun but so can the MILF’s. One of my other favorites was 46, with the body of a 21 yo and she was unbelievable in bed. Just my opinion, but keep your options open on age.