How Would I Tell A Female?

Regardless of any situation, besides the illegal, sex comes naturally. If a girl comes over regularly - she's obviously interested in you. So, why not do something fun with her - and see where it leads?

Go out and eat, stay in and watch a movie, both are great ways to make a move, and if she wants it as well then you never had to ask.

Whatever you do, don't do what an ex lover of mine did the other night and email her on myspace and ask straight out "are you still a freak in bed? " I wanted to slap him. LOL

Well, if she's interested, she won't have a problem with you being straight forward about it.
Just make sure you tell her in person and alone. Don't do it over the phone or internet. She needs to hear you and see you when you tell her.

One, give them a fifty and say you'd like to have sex with them.

Two, start kissing and make out with them and if they are receptive, kick it up a notch.

Three, tell them that you are horny and need to get laid.

Disclaimer: One of the options can be potentially harmful to your health but I can not put my finger on which one, so I'll let you decide.