Sex: One huge thing was to not have relations with your partner in your parents house. This was just a super respect thing not only for your parents but yourself as well. Sex was not considered a bad thing, as long as it was safe but just as a sign of respect to the household to not show public display of affection in your parents house.
Children's shows never discuss climate change. It is a taboo and uncomfortable subject, and people are afraid they may lose advertisers and viewers (especially Republicans/conservatives). But kids deserve the truth.