I have an enormous fetish for female lingerie and many of the other feminine clothing items. I just love being "forcefully" treated like a sissy, and made to be very girly in things I do, what I buy, how I groom myself and of course how I'm dressed, etc.
I've been a Sissy all my life, but I've just hidden it for the most part. I find it so erotically exciting to have my wife 'catch' me (well, she already knows for the most part) and FORCE ME to be her Sissy.
It's not nearly as exciting to me if I have to do sissy things or dress in a sissy way on my own, as it ruins the whole erotic element of humiliation if I initiate these things. For this to be erotic I must be forced, constantly reminded, and surprised (when I least expect it) by a firmly strict dominant female authority obliging me to be a Sissy for her amusement.