The ONLY thing that would cause this is a 'parent' or close relative challenging the childs status over an extended period of time. I've seen women who have given birth to girls telling them, that when they get married they'll find out how painful having a baby was, over and over!
Just like the Priest OR dear uncle Bob, left alone to 'watch the kids' says 'Relax, you'll enjoy it. Remember you can't tell your mom and dad, they just won't understand how WE feel about each other' or 'God wanted me to bless you in this way, and it's to be kept between you, me, and God, All right?'
A child is, between the ages of 6 and 10 (some older), curious about their bodies and their development. If distracted / led down a different path during this time they will generally turn out to be whatever the distractor wills (some will be capable of reverting with little affects - others not), as they've not had the chance to explore the alternative.
As they get older, they see that other people look askance toward their behavior. They, in some cases, then become defensive (or outright offense oriented - outrageous displays, etc.) and withdraw further into the life-style. Others bounce back and forth without much concern, marrying - having children AND running the line!
You can scare, or lure, a child! Once they've been 'involved' they usually think this is the way 'things are supposed to be' - never having seen the 'other' way.
I have talked to several 'gay'' and 'Bi' friends who have other straight friends they're not interested in 'that way', and most have said this is so, most not all! (almost all were initiated by an uncle - aunt) So keep your eye on your Brother / sister - or the Priest!?!
