For myself there's always something that a different sex partner brings to, says, or does during the encounter. I find having various partners intriguing which is one thing I like about it. Each one has a distinct approach when it comes to sex. Another thing is it so pleasurable having someone be passionate about having sex with me besides my wife. That’s not to say sex with my spouse wasn’t fulfilling when we were active, it was. Although when I have an experience with someone new it is so different yet thrilling. Now, even with many different partners, the sex is always different and it’s the adventure of it that I like.