Smelly penis! ?

Okay. I'm sorry this is long, but PLEASE read! I need the help! So. About 3 weeks ago, my boyfriend and I decided to go take a trip. On the way back home, things were getting a little heated. He pulled his penis out and wanted me to give him a hand job. As soon as he pulled it out, I could smell something unpleasant from my seat! But I ignored it. I gave him a hand job. I used that same hand to push my bangs out of my face, and as my hand came across my face, My hand smelled SO bad! It was from his penis! EW! Later he wanted me to give him head, and I was kinda heasitant, but I did anyways. The smell was HORRIBLE. My eyes were watering and I wanted to puke! I just stopped and told him I didn't wanna do anyhing anymore. Then last night, we were laying down and we were gonna have sex. He pulled his penis out and again, I got that disgusting sour and fishy smell! I ignored it and we had sex. I really really want to tell him about it but I'm so scared! I don't wanna hurt him. I don't understand why his penis is just now starting to smell so fishy. We've had sex plenty of times and it has never smelled so bad.  I also don't wanna tell him because he never complains about my orders if I have any. When he eats me out, I get SO self conscious because I always worry about me smelling bad even though I clean down there like crazy. How do I tell him that he stinks without hurting his feelings? I really wanna be honest, but I also just don't wanna hurt him! He's sensitive. Please help! By the way, he is circumcised.