There could be a few reasons why he doesnt want to do it with you or not ready too. 1- Yuk factor - he might think its filthy. 2- Gay stereotype - he may think only gay people do anal. 3- Size - If hes big in size he may think it wont fit into such a tiny whole. I was a number 1. I had a GF who loved anal but I thought it was dirty, she begged me for it and I still said no. I'd say talk to him more about it. Comunication is the key. If that fails you have 2 choices. 1- Leave him and find a guy that will do you that way. 2- More risky - Trick him. My GF got me drunk and horny, she told me she wanted to ride me (lady on top). I was doing her pussy, she raised up a bit to far and i slipped out, she then used her hand to guild me into her arse. Before I knew it I had cum in her arse and I was addickted lol.