Okay, so Alice and Bob likes pie. In fact, it's her Trademark Favorite Food. Thing is, when she eats it, she seems to derive a more-than-culinary pleasure from the experience. For her, this food is Orgasmically Delicious. If watching Alice eat said food is Fetish Fuel, then it overlaps with Erotic Eating. If this food actually boosts the character's performance, then it overlaps with Power-Up Food. If it has this effect on everybody, a Supreme Chef probably prepared it. If Bob really likes Alice, he may give her some in hopes that she will return his affection. Can also apply to drinks.