Home of Rhett & Link fans - the Mythical Beasts!
One of their recent episodes, "Blind Nut Milk Taste Test", made me think of how many different kinds of spreads there are (specifically nut-based ones). Peanut butter isn't the only one. There's also almond, cashew, hazelnut, macadamia, pecan, pistachio, walnut and who knows what else. In the aforementioned link you can also find seed-based butters such as pumpkin seed butter and sunflower seed butter.
Considering Link's position in the show as the official Peanut Butter Aficionado, I think it would be interesting to see them try out different nut butters (or other spreads) on an episode of GMM!