People have an odd fixation for sex, like young kids do with poop. I also guess they forgot "moan and groan" is a phrase about complaining
I associate moaning with pain and general suffering. Is that not the norm? Weird. O tempora, O mores.
"odd fixation" you forget that we are still animals subconsciously driven by instinct and the need to breed
Your FACE is the odd fixation! Sure, but we don't need to obsess about it. It's a one thing to have urges, another to not see anything outside that urge.
I also guess they forgot "moan and groan" is a phrase about complaining