Anticipation

I was inexplicably tired, had been since just after noon. I went to bed early, leaving my husband sitting at the table writing code. He stopped me on my way past him. "I'm coming to bed!" he said. "I know it looks like I'm writing code right now, but I'm sipping my drink, and I'll be along in a few minutes."

"Okay, husband," I said, "but I'm going to sleep now."

"You do that, love," he said, with a smug grin on his face that said he knew I wouldn't be sleeping for long.

He slid into bed behind me and wrapped his arm around me, pulling me close to him. "Sexy girl," he said into my ear, as his hands wandered over my skin, chasing sensations all over my body, coaxing soft moans of pleasure from me for several minutes, long enough that I thought this would be a lovely vanilla lovemaking session.

I was wrong. Suddenly he pinched my nipple, hard and fast. I screamed at the unexpected pain.

Clamped

I've clamped my own nipples before, with these little plastic clothes pins. There was a certain lack of appeal for me. It didn't really feel like anything. Yeah, it squashed my nipple. Okay. That was about it. It didn't hurt, not in that delicious spine-tingling way I had been hoping for.

We also had these vibrating nipple clamps. Retarded, useless things with no bite to them whatsoever. Stupid. They went in the bottom of a storage box to rot.

He hadn't clamped my nipples, even though the clothes pins have been there waiting.

Then he did. 

He flogged my ass until I was taking big mouthfuls of the pillow to muffle my screams, because "this ass didn't get itself up and come to bed with me when I told it to."