Some sort of soft, gentle massage would be medically beneficial. Hands can be a bit rough sometimes, maybe you could use your tits and smoosh them into my lower back. Oiled up, preferably. If my back is too sensitive you could massage the front, maybe in the penis area.
This is a prescribed medical procedure, so it's my health you would be helping with. By fucking me. And allowing me to play with your beautiful, huge tits.