Some people found homosexuality so objectionable and "creepy" that...

[DirkGently]

162. The step-daughter from age 10 is fair game at 18?

Yikes. Would you be comfortable learning your "adult" child began a sexual relationship with an adult care-giver at 18-on-the button? You wouldn't perceive a likelihood of grooming or coercion, or a betrayal of the family dynamic?

C'mon.

First, that's a pretty breezy assumption even on the "barely legal" rationale. The healthy, respectful familial relationship continued until exactly the moment when legal adulthood arose?

You don't acknowledge any conflict or potential for abuse where an adult in a caregiver role from the time a child is 10 takes a sexual interest, so long as the legality clock has ticked past the theoretical age of maturity?

And you think any concerns about exploitation by an adult of someone who was legally a child minutes earlier should be dismissed as analagous to a purely traditionalist, prudish reaction to same-sex relationships between consenting, unrelated adults?

Okay, but I think you're in a small minority who'd be unperturbed to find your child's aged nanny or uncle bedding them the moment they reached the age of majority. A lot of people would perceive abuse and exploitation there, and not because they're prudes or homophobes.