Stu, I don't mean to sound dismissive, but your last post comes over as a sort of excuse?
The norm in sexual behaviour is heterosexual, only a very small section of society practice homosexuality, therefore they can be said to "deviate from the norm"....perverse, as defined in my dictionary.

Ian "hates" ginger hair, :0), but that point is not valid as we are discussing sexual BEHAVIOUR, not race or hair colour....another "smokescreen?"
The same tactics are used to re-define marriage....effectively saying that anyone should be allowed to marry anyone as long as they "love" one another.
Is "love" a cultural trope? "Does it have a basis of fact in behavioural studies, biology or any other science for that matter."