To be honest, I'd lick the peanut butter.

I mean, the hobo has the possibility of being clean. Not all hobos are filthy people. What if he just became homeless? I'm sure that his feet are in tolerable condition.

Besides, even if the feet were rancid beyond all belief, I could deal with a foul taste in my mouth. I could go home and brush my teeth about ten times, and forget the whole ordeal. As opposed to being in a cage with a tiger where something as extreme as death could occur.

In concluding, I'm highly doubting I will be put in either of these situations. So, really, take my reply with a grain of salt. That is all.