Something that acts the opposite
1. An ugly
2. Your wife after putting on a bunch of pounds and/or years.
3. When you're having sex and she says
or does something to kill the mood.
Damn is she ugly... a real Viagra
He: "oh, yeah... almost there, baby!"
She: "remember you said you'd paint
the kitchen tomorrow" or "hurry up, my TV show is on"
He: "crap, forget it, you just
gave me a Viagra