Taste

Does what you eat affect the taste of cum

Yes, and pineapple juice is one of the better things to drink to have a positive change in taste.

Yes, what you eat affects taste of your sperm, but pineapple juice is an urban myth. Eating or drinking things with strong taste or smell, like garlic, onions, or asparagus will make sperm more smelly and bitter. As well, drinking a lot of caffeine and smoking contributes to bitter taste.