Breasts are always inserting themselves into daily life. For a thirteen year old boy this provides a smorgasbord of tasty funnies. At any point, or several points, throughout the day, my boy can be trusted to provide some sort of red faced allusion to knockers. We used to find this amusing, like the first time your toddler repeats a particularly raunchy swear word, and now as he's nearing his 14th birthday he's earning eye rolls.
But then, if boobs weren't funny, the enormity of the subject may cause my son to faint dead away.
That can't happen.
Not if he hopes to actually experience some someday.