sex
sex
It means that when you have sex it hurts, but in a good way.
sex
have sex
sex
it means you had sex with her
This refers to when two partners simultaneously perform oral sex on each other.
It means that two people had sex, when used in a slang sense.
Oh, dude, 1-on-1 sex is like when you and another person decide to have some alone time together, you know, just the two of you getting cozy and intimate. It's basically a solo performance for two, if you catch my drift. So, like, it's all about that one-on-one connection and sharing some special moments together.
It means in a perverty way that he wants to have sex with you.
By "do" I assume you mean a very disrespectful scumbag way of sexying 'have sex with' - yes, you can have sex with a women during menstruation.