Why the smell?!?! (TMI)

My boyfriend is the only person I have ever had this problem with but after sex, man it stinks. When it’s really, really good, the smell is even worse.

I used to be able to literally have a quickie on lunch with my exhusband and go back to work and, yeah you’d know you could smell it if I was in certain positions, but it wasn’t THAT bad. With my current boyfriend, good lord, this is NOT the case.

Even were in a poly relationship and I was sleeping with both of them and even other people sometimes and them, too, and this still wasn’t an issue with anyone but him. Never before.

We dated five years ago, before I got married, and this is our round two. While I swear to God his same tasted like hot dogs back then and now it tastes good... this smell thing didn’t exist and it honestly drives me crazy sometimes.

It’s been like this for the year and a half we’ve been together this time around. Me, him, the towel... everything that touches both of our parts just smells horrible.

I love him. And this is driving me insane.

Any idea what’s going on here?

Edit: it occurs to me one might be inclined to believe this is BV, a yeast infection, a UTI or trich. I know that on my part that is impossible, because I’ve been on a steady stream of varying antibiotics for another medical condition for many years.