45.He's obsessed with Crossfit. In case you couldn't already tell from the Crossfit selfies, Crossfit shirts, and photos with the caption #crossfit.
44. His weekend attire generally involves flip-flops, a tank top, a backwards baseball cap, and neon Wayfarer-style sunglasses.
43.He drinks Muscle Milk. Even when he's not working out.
42.He knows next to nothing about the female reproductive system.
41. He just assumes you're on the pill. Right?