I honestly have no idea. But, I do think that telling someone that you hope they die is a strong reaction to stupid question.
indeed it is.
but it sounds like a jacking fodder question to me...and obviously to her.
i could be wrong, but i doubt he wants to hear the honest reply.
'meh. never gave it any thought.'
and by the time a boy hits puberty, he's not showing mommy his peepee anymore. so we're talking preteen here.
seriously, does any mom undo her toddlers training pants and think, 'wow! my infant is hung like a mule!!'?
if he wants to jack to the daydream of mommy admiring his prick, well, that's his business.
if he wants to ask the board mothers' relationships with their babies and turn it into jacking fodder then he's not going to get a nice reaction.
if he's just totally inept and unaware how gross and un-ok it is to ask a mother this then...well...it's maybe time he figured it out.