I'm about 40 and I've never had a problem getting it up.  Sometimes I can't get it up twice for an hour session, but I usually do.  I'm not your typical Viagra candidate, but I wanted to see what the little blue pill could do for me.  I got a few pills from Kwikmed.com (thanks to a TER board rec).  Getting the pills required answering some questions online that a real MD supposedly read and deemed that I deserved a prescription.  I was not particularly honest in answering the questions but then again the questions lent themselves to pretty subjective answers.  I had to pay like $120 for just three or four pills but each were 100 milligrams and I was directed to split each pill into four.  

My first experiment with Viagra was solo.  Just me and Rosie Palmer.  For some reason I assumed my dick would just start getting hard after 30 minutes from taking the 1/4 pill or that I would feel extra horny, but neither happened.  I since read about how the drug works and it is really pretty ingenious because it doesn't make you hard but it allows you to get hard easily when you are aroused and then keeps you hard until you finish.  So after about 1.5 hours since swallowing 25 ml, watching the Olympics and waiting for my body to tell me something, I decide to take action.  I hit PornHub (ol' reliable), and rubbed one out.  My johnson was hard but pretty much the same as usual for first load of the day.  Time to orgasm and feeling was also normal.  I went back to watching the Olympics.  About 30 minutes later I hit the porn again and sure enough, no problem with that rub out.  Now I could normally recover in as little as 15 minutes so I'm not really experiencing anything groundbreaking yet, except for the fact that my johnson is a bit harder than usual for a second nut.

Now here is where it started getting interesting.  About 20-30 minutes later I hit the internet porn again and was able to get hard pretty quickly and blow a third load with no extra effort.  Three loads in 1.5 hours is not natural for me.  I then decide to wait just 10-15 minutes for the next try.  Sure enough, I blow a fourth load.  this took slightly more effort than usual.  At this point my johnson is starting to get rubbed raw and I am wishing I had been using more lube!   Fifteen minutes after my fourth load, I go at it again.  I'm not able to get as hard as before (they say Viagra lasts for 4 hours and I'm over 3 at this point) and it takes longer than before, but oh my goodness if I didn't nut a fifth time in about a 2 hour timespan.  I think I maybe nutted 4 times in the course of an entire night once and that was like 20 years ago.

Since then I've taken 12.5 milligrams for a one hour session with a provider and I nearly got my third nut off before running out of time (I was hard but just needed a few more minutes than I had).  Was it fun?  Hell yes.  Did the provider get annoyed?  She did not and I honestly think she took it as a compliment.  Having said that, you will note that only one of those nuts was from vag intercourse, so mixing things up probably helped my cause.

One thing to note is that I did not last longer than usual to reach climax.  I normally blow my first load really quickly and Viagra does not change that.  The main difference is that I can get up quicker than otherwise, especially after the second load.