Not really, pineapple is overall a healthy fruit you can have on a regular basis or whenever it is available. Pineapple does not affect the sexual part of your body. Instead it is very healthy for the other parts of your body except for kidney and liver. Pineapple somewhat benefits your sex, as it boosts your immunity system to a greater extent and also that it generates a lot of stamina into you. As far as I know pineapple does not increase or decrease your sperm count or something like that. But I've heard that onions have a tendency of their own to increase sperm counts.