So basically I am fwb with this guy n we have been meeting up a few times a week for a chill n some sex, no big deal. We both mutually understand that's all it is I do like him and he says he's likes me but we just have hot sex most of the time. One or two occasions I been over to see him and we haven't had sex which I didn't over think. Anyways my sensitive question is AIBU to question why I went over last night and for the first time he decided to go down on me? We never discussed it but I did consent when I realised where this was going and enjoyed myself. We then had sex and i went home. Question is he never has done that ever before and it was just so random but felt right. Is it just part of sex as I thort myself it's quite intimate and was unexpected and i have had fwb previous who never did that. I am just feeling abit confused and before people start ripping in to me i did consent and did enjoy it and i am prob just over thinking it but it is quite intimate and had me wondering wtf is going on and thankyou in advance for all ur replies x