My wife and I have had lots of great sex over the years. I really love her legs and I like her to show them off. We have tried many things (bondage, exhibitionism, strip clubs) but most recently started doing gloryholes. It takes her a bit to get up the courage to go, but I love seeing her suck and jerk on those cocks!
One of my personal favorite experiences was watching my wife make out with and go down on a stripper in the VIP area. After the song was over, the young lady asked, "Would you like me to dance for YOU this time?"
More recently we've gone to an adult theater together. One of her favorites was the room with the view where people were watching her suck my cock.