Imagine Dualscar teaching Signless to swim. Of course Dualscar is a natural swimmer and is just like “Well you jump in and you swim,” which is not very helpful.
There’s a lot of Signless sputtering and swearing and hating everything. Eventually though he manages to float on his back and it’s really relaxing. Even more relaxing when Dualscar comes up and lifts him onto his chest so they can trade kisses while the seadweller does all the floating.