Butt, bum, arse, ass – whatever you call it, few parts of the body cause as much head-scratching and discussion as the rear end. Whether you like it big or small, we all aspire to having firm buttocks. My guest this week is known as The Glute Guy. Bret Contreras was teased at school for his diminutive butt, so he decided that the best revenge was to learn everything there was to know about glutes. After today’s show, you too will have a degree in buttology.