Anal Trouble :/

So the other day my boyfriend and I did anal and it wasn’t the first time but it was probably around the second time we’d “actually done it” What I mean by that is that we were actually having sex and not just him shoving a finger up there or him attempting to put it in and then me saying no because it hurt.

So I slide it in because I find it’s easier that way and I’m riding on top of him and as he’s going in and out, it lw feels like I’m taking a shit.

Does anyone else feel this way?

I feel bad because I had to stop it after a few minutes because it just felt weird and it made me feel like I had to take a massive dump.

Am I the only one?