Yes, across thousands of years and an entire continent, everyone agreed on what kinds of sex were okay. Sounds plausible.
It's plausible because truth exists and human beings have an intelligence capable of understanding good from bad. That's why even today people scoff at gay shit. Even when they pretend to be "tolerant" deep down they still likely flinch at the thought of two men butt fucking each other. And this idea ancient socities were more "accepting" or debauched than our own is just a modernist cope.
"Look, the ancient Greeks were all homos! That means we can be homos today!".
Except no, Greeks weren't homos, and homo shit wasn't "accepted" or normalized. It's a fantasy constructed by some British homo hostorian based on cherry picking evidence in art and by reading too much into certain Greek terminology.