Well... when I was with my ex and trying to give him a blowjob (he wasn't my ex at the time) I heard that brushing my teeth before doing it would make it less squeemish and taste better but he might feel tingly cuz of the mint in toothpaste. Well I brushed my teeth and it made it taste better initially but I still didn't like giving him head but I'm off on a tangent now... if the toothpaste made it tingle for him, he didn't mention it.