I am an alloparent to a bisexual young adult and a pansexual teenager! This has come up in my actual very recent life! It's more work to put in the time and energy such that the young people know that the adults in their family have their backs and want them to be in an environment where they can make safe happy choices about sex--that is, more work than "I remember broad gender-based social prohibitions and will enforce them" but oh gosh is it worth it.