come on, few girl can do butterfly with a pair of 26 lb dumbbell

if i can play with that kind of weight, i must have a lot of muscle.

这个就是基因。有些mm 的胸肌比较发达或者结蒂组织比较多，这样的胸胸锻炼就不容易变小。如果基本是脂肪型的，锻炼了就会变小。