How to deal with this?

Okay, so my bf is uncercumsized and even though I know he is hygienic, it sometimes has a smell. He says the smell is pre-cum but I know for a fact that isn't what that smells like. I watch how he washes when we shower, he is perfectly rigorous with his cleaning. I love giving him head, so it does bother me to do it sometimes. Idk what to do. Would you talk to him? If yes, How would you talk to him without hurting his feelings? 

Vote below to see results!