So, for me, shoe removal is key. When its time for me to be a lee, and see a local dominatrix, shoe removal is a must. I love being able to be tied very tightly, blindfolded and gagged, and having my sweaty socks being in my shoes, just waiting to be exposed. I love it. When my shoes are removed, it is really a mind game, and foot curls up, knowing what is coming next.
When its my turn to be the let, socks and sneakers (or some footwear) is a must. Because I have a sock fetish, I never tickle barefoot, only socked feet. I love removing a shoe, and giving the socked foot a quick sniff, before I bend the toes back, and scratch the girls foot. It is by far the best part of the session for me.
When I dated my old girlfriend, I had her wear her sneakers and socks from 6 am, until our 10 pm session. I removed her shoe, and her socked feet were so sweaty and ticklish. She was literally pulling at her restraints because her feet were so much more ticklish. I would also sometimes make her smell her own shoes, which was such a mind game for her, to realize that her own foot smell was turning me on so much.
Ahhhh, good times!