I call myself Diane, and I actually type it out, but I have help from my sister, Nicole, who is ten months younger than I, and my two brothers, Christopher, who is ten months older, and Robert, who is twenty months younger. We were raised by a pair of REALLY sexually repressed parents who didn't let us date or do any of the normal stuff most kids do. We joked that they were "fundamentalist Atheists." That isn't strictly true but we never went to church or anything like that either. But I'm not interested in talking about them.
We discovered one another sexually and while once the four of us left home we dated other people, we just never fit in. We were very experienced in what most would call pretty extreme stuff. Even our jokes made others uneasy. We moved to a state where we won't get arrested if we are ever found out and live together as two married couples acknowledging that the guys are brothers and pretending we girls are just sister's in-law -- heck, our driver licenses even match -- as an aside we have found a little lezzie action between SILs and brother's sharing wives with one another isn't that far off the reservation.
We were taught that sex was sinful and bad -- ironic, non-churchgoers invoking God isn't it -- so we loved and were sexually attracted to each other and then we felt ashamed for doing so and punished ourselves for our feelings. Then we got together played sexual games and punished each other for the wonderful way that our sex play made us feel. It was sick and twisted and oh-so-lovely all at the same time.