I don't know about you but, one of the things that does the most to turn me on is a woman that is casual about her body and her sexuality. One of my favorite movies is The Thomas Crown Affair with Pierce Brosnan and Rene Russo. There are several scenes where Catherine Banning (played by Russo) it's topless. In one of the scenes she is sitting having breakfast topless carrying on a conversation with Thomas Crown (played by Brosnan) with no thought or self consciousness at all. In another scene she is sitting on a beach chair topless and they are discussing their future. In my mind these are two very erotic scenes that make the movie special.
There is another scene where they are having sex all over his apartment with a lot of nudity but the casualness of the two topless scenes are much more erotic to me.
When I read through stories on Literorotica the ones that I enjoy the most are the ones where a teasing wife ends up with some stranger. More so are where the wife is somewhat reluctant or she is just starting out fucking outside the marriage. The most important element to me is the husband's approval and support, even his facilitation.
Scenarios where the wife is braless and/ or in a see through blouse in a bar or lounge bring hit upon by strangers are my top choice. Add to that where the stranger is "feeling her up" right in front of the husband or while dancing in public is ideal. Of course it is preferred for the wife to end up fucking the stranger is the "icing" (pun intended) on the cake.
Any provocative actions in public is a real plus for me. A stranger feeling up the wife in an elevator, a stranger putting his hand up her skirt on a bar stool, groping her boobs on the beach, fucking in a hot tub with hubby and strangers watching and participating, all of these situations are scenes that excite me and are scenarios that I like to envision, for me and my wife. Some of these I've been able to put into action with Amanda and some I'll have to continue to just imagine.
Another extension of my desires, fantasy, goals, involves strip clubs. Wife enters amateur night at strip club, wins, and provides private dances for fans. Usually the private dance ends up to be more than just a lap dance. Also losing wife in a poker game. A common thread here is the wife unwittingly, but willingly, goes from casual observer to active participant and she really lets go and enjoys herself.
Massage is another erotic environment that I like to think about. There are two perspectives on this. 1) wife goes for a massage and get turned on and fucks the masseuse. 2) wife goes to work in a "massage parlor " and fucks the clients.
I guess most of these desires/ fantasies push the boundaries of "acceptable" female behavior and involve the woman going from reluctant, to active participant, to changing her outlook to accommodate her own sexual gratification. Overall a woman so confident in her sexuality, her body, and her desires, that she is willing to push the societal boundaries to enjoy all that sex has to offer is a real turn on.