Were the preference mine, Krista would have her wedding set on for every encounter. There is an incredible, sensual aesthetic, your wife's hand, wrapped around another man's cock, stroking and pleasuring him, flaunting the fact she's married...
In practice, the choice is Krista's. More than half the time in her "variety days" she was without her rings, because her hit rate on picking up strange guys was higher, at least that was her perception.
One of the hottest gestures ever is having to lick and suck a lover's cum off her wedding ring.