Ah, the things that people will research. I have to say this kind of research could either really awkward, or really thrilling, depending.
So now, my friends, it is time to stare at some butts. Some very, very athletic butts. Stare carefully now, you’re looking for SCIENCE.
Sanchis-Moysi et al. “Iliopsoas and Gluteal Muscles Are Asymmetric in Tennis Players but Not in Soccer Players” PLoS ONE, 2011.