Assuming you are female, the most probable reason why a man would do is because of a primitive association with female interaction and sexual excitation. The touching of his crotch is likely to be involuntary; however does reflect very base-level maturity in social settings. Anyone who has ever spent more than a few hours with a male baboon or other types of apes will undoubtably find that the animal is inclined to touch or fondle himself (or outright masturbate) in the presence of a human female. What you describe in your question is merely the end product of a few hundred thousand years of evolution and a complete lack of social etiquette.
dances with her crotch on his crotch
Look for a large bulge in the crotch of his pants... or touch it and see if it's fully hard... if the guy likes it, it'll definitely be fully hard then.
because you touch yourself at night
A girl lays on top of a guy, with her face in his crotch, and her crotch in his face. Give each other oral pleasure. That, dear, is how you 69.
Everything,lets them know where they stand with you,the touch of someone you care about mean everything to a guy.
They like to touch you as much as possible
it is sometimes long but it depends on the guy. It looks like a cucumber except its the guy's skin color.
you'll notice a rise in his pants particularly the crotch area
it means he wants to *** you
It could mean that he is in touch with his emotions or his feminine side.
If a guy touch you randomly it may mean that he thinks you are hotor he likes to touch on your body or he....1.) if a guy touch your hair= he like how you look good with that hair style2.) if a guy touch your hand=he trying to see if you will let go ..3.) if a guy touch your face= he likes how you feel4.) if a guy touch your boobies and butt=he thinks your a hoe5.) if a guy touch your arms= he want to hold you6.) if a guy touch your legs= he want to see how you would feel.7.) if a guy touch your lips = he wants to kiss
it means that he wants to touch your body and maybe your penal organ if he is really gay lolz