Needing advice...found a craigslist add that my boyfriend posted on Halloween, wanting to get together with another straight guy to share pics of each other's SO and talk dirty with each other and s**** each other off What do I do?

Are you talking about he is trolling around for a swinger partner or a third party to add to your sex life? Pffft! If that's the case KICK HIS HORN DOG BUTT TO THE CURB! How DARE he not discuss it with YOU first! He has NO regards for your feelings either way. Get rid of this loser!

I'd be looking for a new boyfriend.