Yeah, I'm gonna disagree on this one. Men can and are capable of loving women -- of course then you get into the weeds of how we define "love" -- but if we're asking if men prefer their friends and only put up with women in order to get sex... I'm not doubting that there are some relationships like this, but that's definitely not the only type of relationship model out there. I've seen many cases of men that prefer to hang out with their wife rather than their male friends. Assuming we're talking about your typical "cishet" couple here... remember humans evolved for millennia to reproduce. Asking if men and women can love one another is like asking if humans and dogs can love one another. Either you've defined "love" to mean an emotion that doesn't exist, or the answer is obviously yes as we've literally naturally selected for thousands of years for those capable of this kind of love.

If anything I'd guess the husband in the show you watched is secretly gay or bi. "Tranny porn" is a particular niche fetish, and as I understand it a lot of the appeal comes from being able to engage in homosexual acts but still feel "straight". This is also where the "trans women getting murdered" comes from -- men getting a trans woman prostitute, then in their "post nut clarity" realizing they had sex with a man and going into a rage due to self disgust.

Anyway, so love and attraction can come in many forms. Homosexual and bisexual people obviously exist, though they're in the minority compared with heterosexual people. And of course humans can reproduce without love -- think of all the raping & pillaging conquests -- but since tiny humans are fairly resource intensive, and childbirth is really fucking hard (thanks bipedalism), humans tend to be more interdependent than most mammals. We all know that for say, a cat, or an otter, the males just bang the females and then bail, and the momma gets by just fine on her own. Humans aren't really like that, we're one of the few species where the female can (and often is) be entirely dependent on the male for resources (ie, stay at home mom). Obviously we do have single mom scenarios in humans too, but it generally is correlated with worse outcomes.

Basically I feel like you're asking if most men are gay or bi, and I don't think they are. It's probably a higher percent than a survey would reveal (due to lingering stigma) but not a majority by any means.

Do you know many older couples? I feel like the fact that men can love women is more obvious if you talk to older couples who've been together for decades. Yeah there's the cliche boomer that hates his wife but there's also many couples where they obviously enjoy being together. I don't know of other species that are that monogamous except maybe those penguins.