IMO, if he really did try to put it in the pooper, then yes of course, that’s wrong and you reacted fine. BUT, just from my own experience, if I come out the shower and my wife is laid on the bed naked, on her front, especially if she was dressed before I showered, I would have likely done the same thing I.e - jump on and try be spontaneous, fun and initiate sex if she wanted it, as I would have assumed she wanted it due to undressing etc. But yeah, the whole anal thing is a little weird. My wife is like you, straight up no to anal, and despite occasionally joking about it, I’ve never actually tried to persuade her or force her to do anal with me, I feel like I wouldn’t want her to not enjoy something .. so why bother right? But yeah, sounds like a miscommunication more than anything else. Just tell him straight up, you will never do ana, but everything else (within reason) is up for negotiation.. so don’t ever do that again, nor try nag me to do anal, it’s never happening.