Garlic and Onions unless your partner has done so also. Fish can be a bit of a turn off as well.
Asparagus - well it takes time for that to be digested and find its way to his semen, where it tastes awful. I haven't had a problem with my girlfriend when we have eaten it.
Prior to oral - Chilli. I have had a couple of firey comments after I have gone down on my girlfriend.