Ewww I agree, I would never give a guy a blowjob with a condom on, If I wanted to suck on rubber I'd lick my tires. And seriously how good could that feel for the guy??? If you're worried, don't let him cum in your mouth. If you're really worried you shouldn't even kiss anyone, nowadays lots of people have already contracted genital herpes orally. Maybe someone should invent full body latex suits??? YUMMMMY......