Taste of cum?

So I've never swallowed for my man. Never even let me cum in my mouth. I have a horrible gag reflex and I'm afraid to puke on him. Im also a bit of a freak when it comes to what goes in my mouth.. like I inspect all of my dishes and silverware before using them. Just to double check they're really clean. So when I first started going down on him, I didn't even want his precum in my mouth.. not even him really but can't avoid that. So anyways, I want to try letting him at least cum in my mouth.. so if a guys diet Is unhealthy, his cum tastes nasty.. right? And pineapple juice makes it taste better..? Well he's a super unhealthy eater. But he loves pineapple.. so if he just eats pineapple and drinks the juice, will it be sweet?