We kissed sober but now....

Would a boy kiss you when he was sober if he found you unattractive? I know they kiss anyone when they are drunk but what about when there sober?

I kissed a boy soberly, but now he said he didn't like it and won't look at me, and every time I joke about sex or talk about other guys he acts like he doesn't want to hear me talk about it. Like he will say 'god there's some things you could keep to yourself' and will pull a face. And like if I say that a boy has been messaging me or something he will make sarcastic comments and sn***** about it. Or he will put boys that I meet down like once I met this boy who had a good job and he said 'oh I bet he isn't as good as that' and 'i know somebody that does it in half the time'

I am confused as I think well he must have found me attractive to kiss me so why does he act like this now? Any thoughts?
We kissed sober but now....
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