dont go around to the same places he is.
Poke his eyes out
Tell your boss about it or tell him if you don't stop staring at me your gonna get a slap around your face
You should kick him out of your bedroom :P hehehe ... and stop walking around naked.....oh no wait don't do that ***he thinks to himself from outside her window*** :)
Put a fake booger on your face
Be more ugly.
You want him and you know it :)
tell you have a new illness the spreads thought vision
Alert the authorities he is invading your space as a stalker; restraining order 101!
keep staring at his penis, he will blush and look away
you know what i do what i think someone stare at me i yarn and if they yarn too that how i know there looking trick of the trade
Walk up to him and dump something on his head and say "Oops! I was busy staring at something and didn't see you"