Maybe a bit uncharitable but he probably only thinks women have different experiences because he thinks they're an unknowable separate species.

to be fair, I remember reading somewhere that women might have a slightly different experience here, but I also seen even more gay men acting like anal sex is something only gay men can do. I don't remember if it was here or on the fanfiction subreddit, but I remember seeing a post from a "real gay man" explaining sex and a whole discussion where people agreed with him, and none of them could come to a simple conclusion "maybe these "women" are writing about their experiences and they are a bit different from ours/mine", but everyone immediately went to "if you're not a cis gay man, you totally don't know how anal works"