Similar to a few other posts here, my wife sometimes helps me by being the object of the voyeurism, and I and any others around me become the voyeurs. This can be anything from not wearing a bra with a sheer top while dancing at a club to flashing in the car, etc...
For instance, this weekend we are going to go away for the night. We'll find a nice hotel somewhere within driving distance from our house, but not too far, say an hour or so. She'll wear her see-through bathing suits in the hotel pool and hot tub, answer room service in various states of undress. We'll probably go out for dinner and/or dancing, and she'll wear something very sheer and see through. I love watching others watch her when they realize she's showing off! Sometimes we'll pretend we're strangers, she'll enter the club/bar first, and I'll come in a bit after her. Giving others enough time to check her out I eventually pick her up.
Then, we'll probably cap it off with some crazy sex in the hotel room, most likely with the webcam on some site such as chaturbate, skype, etc... Letting others watch us fuck on webcam drives me crazy, and is "safe" for her.
Look for us online this weekend! LOL