There have been multiple instances where conservatives have had problems with the word vagina, despite their culture war on women and vaginas. Maybe they feel guilty. It's a far better word than the demeaning and abusive language some men use for that body part and for women; those men are pigs, who don't merit consideration. They place themselves outside of civilized society.
This man is clearly an educator. But then - the right is against education every bit as much as they are against women, especially honest, factual sex education. Shame on them, shame on these parents, shame on the priorities of the conservatives in red states like Idaho.