Public masturbation.

Screw it. It was always kinda hot to just spread your legs, jerk yourself off, and let the ladies watch. You've always had interesting encounters when you do it. Let the ladies come to you, and if they feel the need, they can use your cock and move on.

Nothing wrong with being a bit of a stress reliever for a while.

You sat back, arm over a bench, naked save for your shoes. You jerked off your big, thick, hardened cock slowly. "Wow, your wife has a nice ass!" You'd say. The husband smiling and saying "Thanks. We are on a date right now, I might get to fuck her this time."

"Ha, with an ass like hers? Half this town will be inside her if you look away long enough." You'd tease.

"Pretty much what always happens. We go on a date, some guy knocks her up, and we head home after."

You'd nod and say "Thanks for the imagery.