My SO and I have been together for more than a year and after a couple of months dating he became really fixated on butt play and frequently asks to have anal sex. We've had anal sex once and I can honestly say I wasn't a huge fan of it...lots of discomfort during and after, but he continues to ask for butt play. I've tried talking to him about it and how it doesn't do anything for me but he continues to pressure me about it. I want to make him happy but I don't really enjoy butt play and the more he pressures me the more I'm turned off to the idea of it. I want to make him happy and keep him sexually satisfied but I don't know that anal play/sex is for me. Any suggestions regarding how to deal with this?