"I think it would embarrass me a little bit, you know. I still believe it very much holds up, but, it was really racy," he told E! News. "It was really an R-rated movie, heavy R."
He and wife Reese, who split in 2008, have said in the past they don't want their kids to see the movie and Phillippe still thinks it would be "creepy".
"You know, I haven't checked back in with them about it now that they're both of age," he told E!. "I don't know if it would be creepy for them, you know? In some ways, like, if I were to think about watching my parents do some of the things that their parents do in that movie, it wouldn't be the most appetizing or appealing notion."
While he knows his kids have seen clips from the cult favorite on social media, he isn't sure whether they have sat down and watched the entire film.
In 2018, Witherspoon insisted Ava and Deacon had "no interest" in seeing their mum in any films, especially "Cruel Intentions". "Seeing me and their dad, like, having sex in a movie, it's so weird," she told TV presenter Andy Cohen.