If I know the guy, I like to swallow. If I don’t know the guy, I usually don’t swallow. (There have been a few times when I broke this rule because I was really into it.)
The reason that I don’t swallow guys I don’t know is because once I sucked off an anonymous guy in a video booth (he did have a nice big cock) and swallowed his load. Two days later I came down with a horrid throat infection- never had anything like it before or since. I literally could not swallow anything because my throat hurt so much. I had to spit my saliva into a cup. The lymph nodes in my neck swelled to the size of golf balls. I was in my early 20s at the time and still living at home. My parents had to drive me to doctor. I was afraid to divulge to the doctor what had happened so he just prescribed some general antibiotic. After 2 or 3 days, I still wasn’t getting better so I went back to the doctor. He gave me a shot of a stronger antibiotic. After that, I started getting better. I’ll never know what I had but I’m pretty sure it was gonorrhea. Live and learn I guess.