The top cap, of the gal who's going to loan her caged guy out for a pegging, brings up an interesting aspect of chastity. Once the male is desperate and submissive, his keyholder can pass him around to anyone who's interested. Imagine if the cuckolding wife in the car started doing that to her hubby while she's out on dates. I'm sure she'd pick interesting people to borrow him.
I've done some 'pass the chastity victim around' caps in the past. I'll look at doing a few more.