My boyfriends sperm smells like Boiled Shrimp

When he cums my room immediately smells like a weird glue smell. His thing doesn’t smell weird at all until he cums. I know he cleans himself good but maybe he just doesn’t eat good foods... I didn’t realize the smell until I got seafood yesterday and it was boiled shrimp and I damn near gagged while eating it bc it smelled like his cum. When I give him head I’m ok but he came n my mouth n I almost threw up and he was mad bc I didn’t swallow it...like I just can’t. I don’t even want to give him head until he cums bc of his cum smell...is that normal for it to smell like that and if not then what’s wrong. He’s also an ocean water boy like he loves waterpolo, surfing n stuff...does that have to do with it even tho he hasn’t surfed n awhile?