I have never put a leash on anyone nor has one ever been put on me. The women that share my bed seem to think that I do a good job of curling their toes. I routinely get calls on my personal line inquiring when and if I am available, I never call anyone to get laid. I control when and if someone shares my bed and they of course choose me. A collar and a leash may be symbols of dominance but they are useful only when the person is there. Real power and dominance comes from people that willingly submit to your will from a distance.
Real power is an interesting thing, the more you use it the less you have. The best way to have power over others is to empower them and through that they can become loyal to you. I have found the best sex comes from a sexual partner, not a sexual submissive.