I need the name of a song! HELP!

I heard an old song, and can for the life of me remember the name or artist. I only know a couple of lines. It is about sleeping with the girl next door. Sort of rap, and singing.
They do it on the bathroom floor, etc.
I guess the girlfriend walk in and he sings: SHe was standing there she couldn't take her eyes off me, I shouldn't have given her the extra key.

Anybody know what song I am talking about?

Jennifer

Is it "IT WASN'T ME" by: Shaggy?

Thats it Thanks so much.