Trying to wall off sexuality from participation in the institution of family has given girls this kind of albatross to deal with. Ample chests — check. The possibility of babies to suckle? Not so much.
I am not quite sure what is meant as an analogous measure for the boys/men. Hairy chests? The single dynamic is easier for men than for women. (I’m weird. My back got far hairier than my chest did, and it’s been that way all my life.)
The article states that scrotum and testes development is the analogous measure for males.