"You don't have to be a woman or have a daughter to be empathetic to the harm sexual harassment causes. "

true that. im a man whose been drugged and raped, sexually assaulted as a boy and a man. only one of the 4 sexual assaults was done by a female.  "Sexually charged comments" were the least of my concerns. I was also fortunate that the workplace power element was not a factor. 

I wish your son luck in dismantling "this boys club".  It seems like a lifetime of full time work to identify let alone dismantle that nebulous entity. I hope he has time for the Gender Studies class youve enrolled him in. Oh, another piece of advice he may find helpful: be very careful about who you are alone with, how you drink and how you do drugs in the presence of strangers.