My boyfriend has tried everything (ually)?

My boyfriend has tried absolutely everything, which makes me feel awkward. He keeps suggesting things that he's tried with past girlfriends, which is all new to me. However, nothing I ever suggest is new to him. I once jokingly suggested a ... he confessed he did that more than once! I obviously haven't been as adventurous or as promiscuous, nor am I a virgin or a saint in any way. It's all same old for him and he even said that he's proud of himself for being so faithful to me. Apparently he was a total cheat before! The problem is that this situation is really starting to annoy me now. There is nothing new for him to try and he keeps suggesting things he's done before with past girlfriends, just because "they liked it". And that I find unacceptable. Am I being irrational here? Or should I just end this and meet someone that hasn't lived his life like a m@niac?