B: Begging
Your hothusband/hotwife loves to make you beg for it. Beg for them to cuck you, beg for them to fuck better men than you and keep you denied. Of course, you oblige. You beg and it feels so humiliating, yet so exciting. Watching them achieve sexual bliss with others is even better when they made you beg for it -- to the brink of tears.
This is a new series of short text-only post I'll be working on. Feel free to send me suggestions, especially for some of the less obvious letters.