Similar to a safe word in BDSM.
Sue: I'm not even sure what to say but LOL about her "other pussy." She's a class act, right there. I just hope she wasn't friends with her co-workers.
Mary: That is exactly the reason I don't have a Facebook acct.
Jill: OMG…that was hilarious!!! Mary…..I don’t think we’d need to know about your escapades.
Bob: No, love caves are private.
Jill: I bet you are about ready for a visit to the love cave, aren't you, Bob??
Sue: BANANA! I said BANANA! Stop, dammit, stop! For the love of God, BAAAAANAAAANAAA!
Sue: Banana is our email safe word. In order to prevent us from too much TMI, we need to put an end to this thread.