a son's duty to his parents

to inform, to teach, to instruct / to tell

to forget / (auxiliary verb, after the continuative form of a verb) to forget to …

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

a parent / the originator or founder of a school, company, or other organization / the boss or leader / the larger one of several objects of the same kind

teachings, doctrine, lesson

parent, elder

(2channel slang) someone who immediately posts questions instead of doing basic research