Would this bother you?

Hi all I've been dating an apparently charming man for a few months now. He is very intelligent and we clicked immediately. Our dates have often led to us sleeping together. Our last date however left me feeling quite annoyed and I feel quite uncomfortable with him now. I haven't approached the subject with him as I'm not sure if this is me reading to much into things. We spent the morning together last week I had to leave after a few hours as was going to work. We went out for breakfast and spent a while chatting half an hour before I was leaving he started to get quite passionate clearly wanting to have sex. I explained I would be going soon but we had a kiss and a cuddle he seemed happy with this but then said do you mind if I play with myself and then layed there doing just that! The fact that he did that really annoyed me as I felt it was quite disrespectful due to 1) I'd be leaving soon and he had plenty of time for that 2) I was just sitting there feeling quite uncomfortable saying are you really going to do that? 3) we had like 20 mins together I wouldn't be seeing him again for a week and he felt that was the best way to spend are last mins together pleasuring himself. Am I wrong to feel annoyed or is what he did acceptable ?