Had a great 3 hour session with a fave SP at her incall, then the next day she brought a friend to my hotel for my first duo experience. It was planned in advance, and the friend was a girl that she suggested. A hell of a lot of fun.
Bucket list would be a 3-4 day all inclusive in a sunny destination. Fly down together, sunny days by the pool, warm evenings in bed, wake up to morning sex. Absolute dream would be to pick up a girl at dinner one night for a threesome while we're there.
I have a couple of SP's that I think the chemistry is right for it, but the hurdles are budget and finding the opportunity to do it all without the SO getting nosy