Taste of cum

So my boyfriend has kinda bin hinting that he wants to swallow his cum when giving him a blow job. But the thing is he has never came in my mouth because I tell him to stop me before he does. I don't want to because my friends say it's traumatizing the taste. But to the real question  I've heard about if the guy eats pineapple it tastes ok. Does anyone have any experiences? Or some advice to give? Cuz I would want to do it eventualy just looking for some advice to make it not so bad?☺️