How do you tell a guy...

That his cum does not taste nice? And how do we change the taste? And how long will it take to change?

Also, I know you guys are going to say diet, but what specifically? Because my diet is trash yet I taste amazing so I guess everyone is different

EDIT: I don’t want either of us to taste like skittles, that’s actually disgusting. I just don’t want that foul sour taste, it actually makes me nauseous. FYI, I always taste test before I let a guy go down on me so I know I’m good, appreciate your concern though sweetie.