1.) Yes. Not counting people online and ADISC, I tell my S/Os. For the most part, good reactions. 1 was heavily in favor, 1 was repulsed and told me he wished he never fell in love with me and cheated a few months later (major jerk face that one was, good riddance honestly), and my current one is slightly in favor but for the most part indifferent. No one else knows that I'm aware of.
2.) No way. It's something I keep to myself and don't want others to see.
3.) Close calls when I was younger and more reckless, but for the most part not any more. Not exactly "caught" but the only person I've ever worn around was my ex daddy.