Leave it to 8 INT patchy mcgee over here to put on a magic ring without first letting his party know about it nor ask them to check what it even does.
Love making kinky magic items like this, literally, I homebrewed a whole bunch of magic rings that both served sexual purposes and actually had some mechanical elements that it played into. If players were willing to go for the gag item, then I felt it fair to reward them with some actual benefits aside from either getting boobs or having a dick for the duration of wearing the rings.

Feel free to use these in your own games ;Dc