Slapped Slut

It was strange, He told me to be lying on the cold laminated floor naked and spread-eagled for Him, and naturally I did as I was told. He arrived not too late, carrying a bag, and instructed me to stand up. I stood there facing away from him wondering what was in the bag, it was not long before I knew and realised He was going to tie me up.He bound my chest hard, restricting my breathing but strangely left my hand and arms free. He pulled the ropes from the back, checking that they were tight. He told me to go into the bedroom and kneel on the bed, he pushed my face down on the bed and told me to stick my arse in the air. I knew what was coming but when it did it still gave me a shock, one hard slap on my arse. He then told me to stand up and he untied the ropes,” get used to it” he said we will be exploring this again soon. He left.