Mine was “Not all women like being touched the same way”. As in, some women can’t reach orgasm from penetration alone, but some do. Some want direct pressure on their clitoris, some do not. And this all makes sense, not everyone likes the same things.
And that is, for me at least, where the fun is. I like to figure things out. I like to see how stuff works. And women are pretty awesome. What would be a better evening than figuring out exactly how to pleasure someone, through communication and experimentation? I’m still finding ways to push my wife’s buttons 14 years later.