There's the comfort of being support for those around you, and then there's the comfort of literally supporting a dog with your leg. It's nice, and he's not inclined to move away.

"Or ankles. Whatever. Just mean I'm happy a mermaid didn't swim up and try to grab either of us." Maybe the water they were in was too shallow for mermaids. Gokudera chuckles at watching Yamamoto checking himself for a tail. He wasn't being literal!