Flogging. Shipboard flogging.
The crack of the whip was sharp and startling over the sound of the water hitting the sides of the ship. It sounded twice more before the captain ceased.
"Do you admit your wrong-doing, Potter?" Captain Snape snarled.
Several of his shipmates whispered he should just confess, even if he did nothing wrong. Potter's back was liberally decorated with weeping welts, shirt shredded and hanging in tatters around his bound wrists.
"Never, sir," Potter spat, green eyes fiercely defiant.
"Very well." The captain raised his hand once again. He hoped his trousers were loose enough to hide his erection. He always became aroused by Potter's insubordination -- and his sweet surrender later in the Captain's cabin.