[Dualscar doesn't answer right away, too caught up in the sensations of the Psiioniic's hands on his back. The other troll is working out knots Dualscar didn't even know he had, and if he keeps this up, he's going to have a happy little purple blob of seadweller on his hands.]

Fins in general are pretty sensitive, but the one on my back has the most sensitivity. It's also the only one I use for swwimming.