Clark could not resist Lewis's ass. Whenever the two were hiking and Lewis was in the lead, Clark kept his eye on his companion's round bottom for the entire trek, only looking away if Lewis warned him to look out for a rock or a tree root on the trail.

The past few days, Clark had noticed Lewis showing some hints: winking and blushing whenever he spoke to him, nervously playing with his fingers and twisting his toes whenever they faced an awkward silence, crossing his legs as if to hide something. They had shared hugs and kisses and held hands, but nothing more. Clark had seen Lewis undressed in the mornings before he got dressed, before bed, and while he bathed. Back home, Clark had done the deed with a few ladies. But never with another man, even one who had feelings for him.

That afternoon, while Lewis was making some sketches of leaves in his journal, Clark tore a sheet from his own notebook and scrawled a little letter:

To Lewis's Butt,

I can't keep my eyes off of you. Round like a bubble or a smooth stone at the bottom of a lake. I want to touch you, squeeze you. And do some things to you that I cannot write on paper due to common decency.

-A secret admirer

When Lewis was not looking, Clark sneaked the note beneath his pillow in their tent.

That night, Clark feigned sleep while Lewis prepared himself for bed. He smiled to himself when he caught sight of Lewis finding the note and reading it silently. He saw Lewis's face go red, and he grinned and stuck the folded note into his satchel.

"Clark?"

"Yes, Lewis?" Clark pretended to stretch and yawn.

"You know we're the only two out here for miles, right?" he chuckled. "No need to sign any love letters from a 'secret admirer.' Mind if I... I mean, my behind joins you for the night?"

"Be my guest!" Clark exclaimed, sidling over in his bed. He laid a hand on Lewis's face, drew it to his, and kissed him.

"The round bubble butt is all yours tonight, Clark," Lewis said, winking and turning over on his side, his back facing Clark...