sex

Sex is fucking another person of a different gender...

It can be like a dick to pussy, dick to mouth, etc.
It involves orgasms, fingering, moans, etc.

Girl: Aahhh harder john harder~~ Ahhhh eughhhhh
Boy: *chuckles*

Girl: ahhhh ueghhh ahhh *moans harder*
Boy: you like havin' sex huh.