Do guys develop muscle without having to work out?

Question

If so, how and when would this happen? Like during puberty?

Answer 1

never heard that  

Answer 2

no because girls just dont get their muscels without working out they dont just do what they want to do unless its excersising you dont just need to go to the gym!!  do you got a bike?? ride your bike run the  block everyday, do jumping jacks for a half and hour!!

Answer 3

everyone has muscles. everywhere, i believe guys develop it to be a bit more noticable then girls, but you have to weightlift and workout for it to ACTUALLY show and build up, and stuff like that.

Answer 4

yes,if you are already an athlete,such as a swimmer...