scrape along
scrape by
scratch along
squeak by
squeeze by
rub along

Just happens to rub his top fin along it once in a while.

This starts with one male rubbing its chin along the back of the other.

As we sailed through the dark, I rubbed a hand along his thigh.

She rubbed two fingers along the lines above her eyes.

He rubbed his lips along her exposed neck, and I couldn't take any more.

He rubbed a finger along the side of his nose.

She rubbed her hand along the body all the way to the tip of the tail.

She lifted his hand and rubbed it along her cheek.

Andrew asked, rubbing his chin along the side of her head.

She seemed to rub along his side and Creideiki thought he could almost feel her.