I had a BF who got upset when I would spit out. My reason was 2-fold: he often didn't taste good, and by his own admission he fucked around with other guys. I suppose I was already taking a chance with catching something like Thrush just from putting his cock in my mouth, and his cum could well have contained HIV, he was so careless. I even worry about him now, years later, because he remains a slut and doesn't test often enough.
Well anyway, one time I took him down to Key West, and we were naked in a steamroom with a bunch of other guys. (It was the Island House gay resort, if you've been there)
And just to show off, I dropped to my knees where he sat and gave him a BJ. And by his yelling it was obvious when he came, and that by not stopping it was clear that I had swallowed it all, a little gift for him. Nor would have I humiliated him & me by spitting out in front of those other men.
Standing up and wiping my lips, the other guys, most stroking themselves by now, pointed to their dicks as an invite for me to do them next. I ignored them and left with my BF for the gang shower, where he sucked me as a reward, knowing I love shower sex.
Being a slut myself is the one thing I miss in being partnered. I do prefer having a single, wonderful loving man in my life, what's always been my goal, but at the same time being a tramp was fun in its day, and having to always decide whether to spit or swallow with a new guy.