The morning after "walk of shame".
How do people recognize someone had sex?
Most of the time ? You just know ! LOL
Messed up hair, maybe, but that could just be from wind or something ....shirt on inside out coming out of an elevator...other than that I don't think people can tell.
Walking funny.
You'll walk funny especially if you're a female!
This song by Mouse Rat (from Parks and Rec) illustrates one way that you might tell:
lol
They have a smile on there face.
There's two side of this!
1.Knowing someone "just" had it. 2.Knowing the "previous" relations. (without scientific involvement or tests)
For number 1:
-Sudden change of mood, (the differences of the moments) -Short and fast breaths with messy cloths and hairs on while they trying to get themselves together! -Some get red skins and lips -Some lips get real dry and while they do talk their tongue stick over their mouth like they are highly dehydrated. -Some people's skin stays warm the way you can catch it like a fireplace! And so many more, while every one of them could be caused simply by something else, and everything is dependable up to the moment.
For number 2: I know some about women, a women's gesture, body language, walking style (sometimes a conversation near the topic) and some other tips that can give up if a women had previous relations or not.
A really good experience tends to produce a radiant "glow" which is unmistakable once you have seen it.
Flooding the body with those hormones is good for both body and soul.