The air was pushed out of his lungs on the third smack. The second one had caused Stiles to shut up but the third was harder and let a harsh sting. The fourth got a whimper from Stiles. He grabbed onto Derek with his free hand, needing kind of stability to keep him up on his feet. The fifth smack forced a cry from Stiles lips and he already had lost count on how many.
"Derek..." The name was breathy upon Stiles' lips because even though the spanking was a punishment it was starting to become something sexual to Stiles. His body was responding to the harsh pain and turning it into sweet pleasure that made it impossible for the teen to think.