You've found intimate journal entries about another girl in her diary.

He acknowledges the existence, apparently, so that's not it. But clearly the Lesbos are much less dangerous to the fabric of society. After all, two girls is *sexy* while two guys is just icky.

Or something along those lines.

Also: the "pounding a peg into a board" comment almost makes me suspect a spoof. I mean, fer crying out loud.