He probably masturbated just before going into the booth. My preference is to not masturbate for a few days, go to a booth and let the guy suck me and cum in his mouth. If he swallows, which 99% of guys seem to do, I'll ask if he can suck me for longer and I get fully hard again and give him a second mouthful of my cum. Going to confess, if I'm going to give an anonymous guy two of my loads, I'd like to at least know his name