Have you ever got a major raging hardon trying on clothes in a dressing room and let the sales clerk or another customer watch you?
have you ever had a "competition" with some buddies or team mates or even a brother or two to see who would shoot the most or shoot the furthest? Maybe even who could cum the quickest over and over?
have you ever got a hardon in class or gym and realized another guy was checking you out?
I have absolutely no limits at all with my mouth the nastier a guy gets the better for me. ;)