Yup, that's a classic around here as well. We usually have "Toto jokes". They range from pretty childish to overly sexual/trashy.
Anyway, in the adult game market (or in life, actually), there are two kinds of people. Those with a loaded gun... Wait. I mean, those who can take challenging stories/jokes/events, and the entitled little bastards. Usually, entitled little bastards (known from there on as ELBs) are barely worth getting riled up about, since they're only good at one thing: complaining and not contributing in any meaningful way.
The ELBs are not who we make games for, and if their fragile little ego gets bruised because of a few jokes, just let them go. And nothing of value will be lost.