6-packs at 7?

Working from home today and overheard my 7 year-old and his buddies talking about what workouts could “actually give you a 6-pack!” Huh? Since when are 7 year old boys concerned with 6-packs? Since when do they know about 6-packs? And why are they sitting on a trampoline and talking about workouts rather than working out on the trampoline – I thought that behavior was reserved for people like me, middle-aged suburbanites who like to talk about exercise over dinner and drinks.