Objectification is an odd thing and goes against a part of being human. Humans pride themselves honestly or falsely in believing we are all equal and to treat someone as an object and use them as such goes against that.
I love to objectify a submissive boy, it is something that gives me pleasure. The simplest form starts with having a guy stand where I direct and then have him strip on his own or at my instructions. When he is naked I start to teach him that his body is mine by inspecting him but not only visually but with my nose and hands. I will have him hold his arms up, bend over, spread his legs, stand straight and any other position that gives me access to all parts of his body. I will run my hands all over him, tweak his nipples, down his armpits, over his stomach, grab his dick and balls, down over his ass cheeks and from the back of his balls over his hole to the top of his crack.
He may have thought he had a level of privacy but not with me. Subs are kept naked while I am fully clothed to show the discrepancy and put him in the right frame of mind. I have had new boys naked within minutes of stepping in my place and the objectification allows me to have no hesitation in touching them. Normally when you start a vanilla relationship there is some hesitation to get closer, there isn't any intimacy in the beginning of playing with a sub so no need to pause or worry what they may think.
Sometimes I have to pause an think about my nature that I find it easy and fun to treat another human like this and smile. There are other forms of objectification such as using a sub as a foot stool, side table, piece of art and so on but those forms come after the basic of treating his body as your plaything.