Tit for Tat

Mark grinned after his girlfriend's playfully wriggling butt.

"Not so fast..." he growled. He took a few fast steps, not noticing he left his shorts behind as he did this. Fully naked he reached Chloe and slammed his open palm into the perfect, pale round buttcheek.

SMACK!

"Owww!" Chloe exclaimed.

The stinging blow made her hop and stumble. She whipped around on her nude boyfriend, an aggressive grin on her own face to match his.

"Oh, you are so dead!" She exclaimed.