I remember vividly a night about a month after my now-wife (then girlfriend) and I had crossed the oral sex boundary in our relationship.
We were out with a group of her friends celebrating someone’s birthday with a night of bar hopping, and when the night ended we were fortunate enough to be able to walk back to her place from the last bar that we’d been at. This was the first time my girlfriend of about 4 months and I had tipped over from the bordeline of buzzed to drunk, and it led to a very fun time.
Part of why I have a very clear memory of the night is because it was my half-birthday, which isn’t really a thing except that I was using it as an excuse to try to get a bit of extra fun from my girlfriend, joking that the bar crawls was for our other friend’s acutal birthday but also in honor of my half birthday, and messing around with her by asking about what present she had for me, etc.