As one who always Dines at the Y....and has a mustache I always make sure to wash my face with soap if I don't want any suspicious looks.

The phrase "Scent of a Woman" exists for a reason. And I love it!

Do you think that people can tell that you have had sex within the last few hours from the odor around you? I am talking about after regular sex and not wild sex with your body sweaty and having cum over yourself and you did not take a shower afterward.

I normally do not sweat that much and after sex would not take a second shower but just clean around my groin area.  I wonder if there would be any leftover scent on one's body, again assuming no cum accidentally left on your body from yourself or your female partner.

Just curious.

I think if you've taken a shower there's not going to be any obvious scent.  Not of sex at least.  Of course, there's always phermones, but that's not an obvious 'scent'.

Now I'm going to assume the motive behind this question, is whether a significant other can detect the scent of a recent hobby activity.  I know that's been of concern to me.   So then it's not just the scent of sex that might be lingering.  It could be the scent from the shower gel or soap you used.  If it's different that what you'd normally wash with, that might prompt some questions.  Or maybe it's the scent from candles or incense that were burning in the room, that's now in your clothes?   If your significant other does the washing, that might be of issue.

Dogs have an amazing ability. Some "companion" dogs can be trained to tell when their owner is about to have a seizure and they can push the person gently to the ground. They smell the chemical change before the seizure.  

Other tracking dogs can scent fear, so if someone is afraid, like a suspect hiding or a victim tied up, they will alert.  

Dogs can distinguish between identical twins.

Some dogs can be trained to alert at cell phones.  Not any electronic equipment, but only cell phones.  (The use them in prisons.)

It is very possible that your emotional state is affected by recent sex, and a dog could be trained for that scent.  

My dog knows.  I went to a multi-hour lifestyle party and engaged in sex with multiple partners.  There was no opportunity to shower before I returned home.  When I got home, still reeking of sex, my female dog took one sniff, looked me straight in the eye, and had a look that said,  "You slut, you've been with another female!"

I depends. I would recommend showering. Everyone's nose is different.
I can tell if a gal is pregnant by  her scent just walking her past me.

if you have sweaty sex... is there any other kind???.... the odor might stick to your skin.. Shower a  long time!!