The above facts, when coupled with the knowledge that the vast, vast majority of child abuse and child sex abuse are performed by someone the minor knows, can only lead us to conclude that the purpose of such policy cannot rationally be the protection of minors. The minors in question would in fact be safer seated next to strangers, male or female. Yet there is no policy of removing minors from the comparitively risky proximity of their parents while on board aircraft.
The only achievement of such policy is the ritual humiliation of males. I would need a lot of convincing not to conclude that this was also it's prime intent.