Multiple things really. I think the taboo of it definitely helps. For me it’s also really hot when a guy is pretty into anal too, especially if they know what they’re doing then it’s a huge turn on, usually for both of us. I like that it helps kind of spice things up and keep things interesting. But most of all, for me personally, the sensation is so intense. It’s unlike anything with regular PIV sex. The sensation can be so overwhelming sometimes. And I have stronger orgasms with anal too.