I have never put any credence in the pineapple thing.
Swinger signs
It's funny, we moved up from the southeastern part of the US years ago - in the south, you see pineapples everywhere. They are considered a sign of southern hospitality. We actually had a pineapple house flag up for many years long before even thinking about the lifestyle!
The glaring thing for us is what are you hoping to gain from knowing if your sister in law is open to swinging?
Be careful of black rings, i they are quite common and don't think they swing, but i could be wrong....
Toe rings, black rings, anklets, etc. are pretty common and so are pineapple shirts. If the pineapples are upside down on multiple things she owns then it is a definite maybe.
How does she act in real life? any hints from that? Dresses sexy?
just because she has a pineapple shirt and a toe ring doesn't always mean that she's a swinger, and even if she was I would suggest not getting involved with her
Why do you care if your SIL swings????? What advice are you seeking, exactly?
Ask her if she is in the "lifestyle".. and if she says what etc ,change the subject.. most of those who "WEAR"..those things mentioned have not been swingers. If she says... YES just smile !
My sister in law Where's a pineapple t- shirt and a toe ring...not sure if she is open to swinging but sure shows signs....what do you think??