Condoms.

Oh wait that's slaynish. N/m he's stupid. Not that it's any concern but I think your diet affects your part's "taste". For example vegetarians are supposed to taste like sugar because of chemicals in the food. But definately no condom, but also definately the pill. Of course its also a good idea (a little bit more risky) to go with the times of her periods. If you hit it right almost 0% chance of pregnancy, no pill no condom needed. It's a little hard if her periods are wierd though. The pill also affects sexual interest after too much usage, which is definately a bad thing.