I just don't get it

It's almost a gilded chestnut of stereotypical behavior. Put two girls together and have them start kissing and sexual with each other and guys are crawling out of the woodwork and pulling up chairs to watch. If they aren't going to set to carpet-munching with a vengeance or whip out a strap-on dildo from out the ethers, they can at least fall into a wrestling match where hopefully clothing is torn away to reveal curvy bits of flesh boys just don't have. Hot girl-on-girl action warms the cockles of a man's heart, or to borrow the words of Dennis Leary perhaps even the sub-cockle region.

Which means I am a mutant. I get nothing out of witnessing such actions. At most I am moderately more interested in watching two women performing a mutual lingual exam of the other's tonsils than the same action performed by two men, but largely I am unmoved. Whatever ineffable element of "hotness" there is that prods at a male's lizard brain, just doesn't seem to be present.

I'm nowhere near being unaffected by the female form, depending on circumstances. I have to add that little caveat because once you've worked in an environment where it's everywhere, you either learn to let it fade into the background or you lose your ability to perform your job. No, I'm just as prone to attempt self-inflicted whiplash at the notice of a feminine body as anyone else I have met.

I think the deciding detail in my subconscious is that girls don't behave in the same way sexually with other women as they do with men. The body language isn't quite right. The physical cues are off just that slight bit. It's sex that has no provision for a penis.

Or that's my current theory. If that prohibits me from being a manly-man, so be it.