34 M with a beautiful 32 F wife. I've been friends with a couple of guys for some time now and a few years ago I noticed one of them talking to my wife when we were at a party. She is beautiful but completely oblivious to the male gaze but I could see what she couldn't. I saw him glance down her top when she was looking away too. I let him look however much he wanted that night. The next day it was just us guys hanging out when I told him I knew what he was doing yesterday and he looked flustered. I told him not to worry about it, I know my wife looks good and if I could I would want her to never wear a shirt. That made him laugh and I told him that if he knew the kind of pictures I had on my phone he would probably have a stroke lol. He took the bait and said that I would probably react the same way if he was his phone. He started talking and I let him peek at a few "decent" shots I had of her and I got to check his gf too. Now it's a secret between us and we love sharing each other's wives. We even plan vacations together where we go into hot tubs and get our partners to pack skimpy swimsuits so that we can look at them. There were a few adventures but that's for another time !