I will offer a couple of reasons hopefully many people can contribute more. Their are probably umpteen ( for want of a better word ) reasons why this is so .
Lets be bloody honest about this , sex is the be all and end all of society , and has been since Adam gazed upon Eve. (if you can beleive that story )
I am a male , so I cant speak for females , though I think we may have something in common.
From my earliest memories that I can think of 4,5,6 years of age , or whatever I had erections , I had no Idea what was happening to me and eventually found a way to releive it....Did I tell my mom or my dad ? Of course not, I was ashamed and felt guilty , so you keep it to yourself.
And every time it happens the more you feel guilty .But at the same time it is pleasureable , its a mixture of pleasure , releif , and guilt.
So when somebody , a freind , family member , or even an acquaintance makes an advance at a vulnerable moment a child may/could succumb to their advances ...Then what follows guilt , shame ? regret ? Do I tell my parents ? Was it pleasureable to me ? Do I want anybody to know what I have done ? or what somebody has done to me ? Hell no. So they dont tell their mother or father .
If the mother or father do get wind of it , they dont want anybody else knowing about it , so they keep it quiet , so as not to bring reproach on jehovahs name or the organisation .
And the cycle goes on.
smiddy