that's so not an excuse.
I've gotten almost all of my girlfriend's that i've had to watch porn. Most girls put on the face like it's gross and they'd never watch it, but once it's in the VCR, they're harder to pull away from it than I am.
The worst are Playboy magazines. I left one on the coffee table, because it had a girl from my highschool as the centerfold....and EVERY single girl that i had come over flipped through it just to see how perfect the girls look. Females admire the female body, just not in the exact same ways as men.