I have a good friend who is a psych student and told him about my diaper fetish. He has some kinks too (which is the main reason why I think he is taking psych courses), but he believes that problems of this sort are caused by where you are in the family pecking order. I have an older half-brother from my mother's first marriage and my younger brother Greg. My friend believes that first-born kids and only kids are less likely to have sexual kinks and second-born more so. Where are you?