Perhaps I didn't phrase that well. Some additional explanation may clarify:
There may have been a time when my wife would have been willing to participate in a 3 way, with me licking her pussy while she is getting fucked.
Unfortunately, that time has long since passed.
I do have a (girl) friend who is willing to do that, but finding/getting someone to join us is more difficult. It's not like she or I will drag somebody in off the streets just to satisfy that fantasy. Since we are older (60+), we don't frequent bars/clubs or other places one may consider a traditional way of meeting new people.
The same goes for meeting people on the internet. It's possible to meet someone and develop a chemistry over time, but the same is true for meeting people face-to-face, and I'd much rather do that.