I didn't read it.
"Since you made the crazy assertion that most or many heterosexuals practice anal sex, it's up to YOU to prove it. "
It was an opinion, and I did not say most. I stand by it. Many heterosexuals do or have engaged in anal sex. Howard Stern has made it a common topic of discussion.
"And you can't, since the only stats available are for STD clinics, and the kind of people that frequent them are not representative of regular heterosexuals. "
Maybe, I wouldn't know. I never looked for stats on anal sex. I'll take a look in a bit, see what I find.