"If the parents decide with the doctor's help to turn their son into a girl because they're afraid of the ribbing he will get with a small or deformed penis then that's shameful and should be illegal. Likewise for girl's born with male-looking genitalia."
The current medical thinking on treating infants, with ambiguous genitalia, is to wait until the child can tell their parents and physicians which gender they are. There have been a number of cases, where the decision was made at birth, where the wrong assignment was made. It was not for the reason of concern the child would be ribbed over their genitals, it was more of thinking the parents had to be able to think of the child as one definite gender.
And if the doctors are so concerned, then why not require genetic testing in doubtful cases and correctly inform the parents of their child's sex? At that point the parents could work with their child's given gender rather than against it.
Also since it is the majority belief that homosexuality is wrong, I believe that it is the responsibility of all people to make it clear what true gender they are before engaging in intimate relations.
If a teenager is attracted to another Christian teen and has been misinformed about his/her gender, then how can he/she represent him/herself correctly to a prospective suitor?
Of course in the future we will all be wearing unisex lycra jumpsuits and gender will be the least of our worries as people start dating intelligent octopi from the plant Zorkol!