Amanda Seyfried talks about watching porn, is shocked by the sheer volume of pubic hair

There will be many of you out there who will know how Amanda Seyfried felt when she was researching her role as Linda Lovelace, the star of Deep Throat and Dog Fucker. You'll understand her pain at having to sit through hours and hours of jolly (and not so jolly) rogering, hoping at some point to get an insight into the psyche of someone who gets paid to let other people stick bits of themselves into her. That's why you watch it, isn't it? For research purposes?

Of course, being the serious thespian she is, Seyfried was more than a little shocked at what she discovered. Apparently girls in porn used to have pubic hair! Amazing, eh? (Via Glamour)

"What surprised me is the amount of pubic hair!" 

"I'm pretty sure I would never do full frontal in a movie - for personal reasons, I wouldn't really want to show that."

Just out of interest, what other reasons are there? Legal? Military? Physical? Unknown? Rhymes And?