I have both rubber boot and foot fetishes, and my wife and I wear thin, unlined latex rubber boots as well as rubber gloves during sex. Although she does not share my fetishes, my wife fully indulges me and lets herself get into it, saying it enhances the pleasure of the experience for her as well. I love slipping her quivering rubber boots onto her bare feet, then caressing her rubber-clad feet and kissing her toes through the thin rubber. A big part of our foreplay involves entwining our legs together and playing footsie in our rubber boots, as well as drawing our feet up to caress each other's genitals with our rubber-covered toes. I also lightly stimulate her nipples with my rubber boots as well as with the empty fingertips of my rubber gloves, which can take her close to orgasm. I sometimes slide my rubber-gloved hands down inside her rubber boots to caress her bare feet. When she's on top, I will hold and caress her rubber-booted feet as we fuck.
As an aside, I love summertime when all the girls show off their pretty bare feet in flipflops. I hope this barefooted fashion never goes out of style! Cold and wet weather presents its pleasures too, watching the girls in their rubber rain boots--and, I might add, enjoying wearing my own rubber boots.