Title sounds bad, but let me explain. I (19M) was at a party and my friend (Jacob) and his girlfriend were there. This was the first time I met his girlfriend. Another friend brought some molly for a few of us, this was our first time trying it but we were with a couple people who had done it before. Molly makes you very happy and confident and makes you very affectionate towards people. Jacob, his girlfriend, me and 3 others all took some. We were all talking and it came up how we each lost our virginity. I told them that I was still a virgin and that I had never had a first kiss. Jacob's girlfriend offered to give me my first kiss and I said "no I couldn't do that to Jacob" (who was in this conversation). He said it was fine if I wanted to since it didn't mean anything, so we started making out. Jacob saw the whole thing and kind of congratulated me afterwards.

The next day I was talking to Jacob about the party and said it was funny how I kissed his girlfriend. He had clearly forgotten about it until now and got annoyed. He told me I shouldn't of kissed her and the only reason he said it was okay was because of the molly and alcohol. I said that me and his girlfriend were also on the same drugs as him so he couldn't really blame us if that was his excuse for allowing it. He said it is different and we shouldn't of actually gone through with it even if he did say it was okay.

AITA for kissing his girlfriend?