It's Just Rings

"It was quite maddening, how Hijikata sometimes forgot that it was here, for whatever reason, and the simple brush of his thumb over the cold metal brought it back to his mind like an electric shock.
It shouldn't affect him that much, shouldn't distract him that easily. But here he was. Helpless against a simple ring of silver."

____
"Without realising it, the ring quickly became a familiar object Gintoki never dissociated himself with. Even in missions where it seemed better for him to be single, the idea of removing his wedding ring slowly vanished from his mind, the option becoming inconceivable."

Or Hijikata and Gintoki are freshly married, currently obsessed with their wedding rings, and no one is really sure whether they should be disgusted or softened by it.