Years ago, while I was still finding myself as a Dom, I played several times with a cute little cub who was in his late 30s or so. He wasn’t kinky but he was kink-friendly and has a mildly submissive vibe, so we got together several times and usually wound up playing, more or less vanilla.
But on one occasion, he was lying on the bed on his belly and I was nuzzling his neck and sort of warming up for the main act, when I discovered that his back was ticklish. I was kissing my way along his spine when he suddenly shuddered and began to squirm and giggle.
That was pretty much waving a red flag in front of a bull. I started running my chin up and down his back, running it back and forth, gently tickling him with my beard whiskers.
Although he was vanilla, something about the whole scenario starting pushing my dominance buttons and pretty soon I had him absolutely helpless with laughter. I was loving how much control I had over him in that moment and I could tell he was enjoying it, so I went to town on him.
Suddenly, he shouted, “Periwinkle!”
Confused, I stopped and said, “…Is that your safe word?”
He sheepishly replied, “It was the only color I could think of.”