go buy a new toothbrush with replaceable heads. brush your teeth until the original one is used beyond reason. then put a new one on it. then MAYBE your moth will be sanitary. god it's like you've been going down on your sister twice a day. ewww. incest via toothbrush.

If you had a normal regular toothbrush you wouldn't have this problem. Switch tooth brushes and buy the girl a vibrator. Problem solved. Or - what the guy above me said. Brilliant!

That is so ****** up man.... Nd the worst part is u cant even tell her to get a room... ROFL hahahahaha NO but seriously thats ****** up....

EWWWwwwwwwwWW thats so messed up!! Buy a new toothbrush.

OK, first, get a new toothbrush and hide it and leave the one she used out. Then, wait until the next time she decides to pleasure herself with it, and once she's got it going, pull a Chuck Norris and roundhouse kick her door in and yell "I knew it! You have to buy me a new toothbrush or I'll tell mom and dad." Now, you have a new toothbrush AND something to hold over her head. Blackmail truly is the best revenge.

just burn the toothbrush, naturaly

Wouldn't that be painful?

that is soooo gross!!!!! throw the tooth brush into the fireplace!!! u no wat, dont even touch it- tell her to keep it! that is the grossest thing ever!!!!

Lols! Omg I feel so sorri for Joo :P Haha! But I don't blame her ^.^ . . . Buy her a couple of Vibrating toothbrushes o.O ? Hawt....and works :P ...Tis Kinda embaressing having ****** around O_O lols.

jack off onto her bed like 20 times and then give her a blacklight as a present. make sure to set up a camera as she slowly put the pieces together about what all that white stuff is haha

#342 that might turn her on.......if she is using his tooth brush she obviously has a thing for her brother

lol i guess it would make a good vibrator kinda...my friends gf, who im friends with, masterbates all the time. lol she wants a vibrator, i should tell her to get an electric toothbruch. but really tho, that sucks.