I think shaving or waxing the body emphasises what there, if there’s fat it looks fatter, if there’s muscle it looks more muscle. I shave from neck down (except pubes) once a week, and chest twice a week. They do a men’s waxing service at the gym where I go but I wouldn’t like the hair growth in between.
Some guys may not like shaving their bodies as they think it look feminine, I’m straight but still like a smooth body. You’re body isn’t dissimilar to mine; I would shave your ass all over and inside as well.