I (22f) decided to become a slut after my first kiss with a girl [FF]

(Names except for mine obviously made up, everyone in the story is over 18)
That was years ago, so far I had thought to be only attracted to guys, but then I got invited to a chill evening at a girl’s (Cory) place with a couple of friends from school, two guys and three girls. We drank a bit and just talked and had fun in general.
After some booze (legal in germany since we had all just turned 18) we decided to play a few rounds of truth or dare, so far so good. It was an average run of the mill game with boring stuff, until one of the girls decided to dare one of the guys to kiss our host Cory. Cory was not really into it as much as him but actually did it and we watched in excitement. Even though I had been fantasizing and masturbating a lot already, I had never had a real kiss before (probably because I still was a bit shy at that time, lmao) and I was anxiously debating with myself which one of the dudes I’d rather kiss. The other girl was then dared to kiss the second guy and they went for it a bit longer. Then when it was the next turn they decided to step it up a bit and to my shock told me without even thinking about it: “Emily, I dare you to kiss Cory while holding her boobs!”
I was completely dumbfounded, but Cory this time was SUPER into it.