M4ApF My slime girl gf uses my body as slime storage

Slime girls are made out of a sticky mostly translucence jell we call slime. Their bodies grow bigger when they are exposed to any kind of liquid such as, soda, water, fruit juice, cum, milk, etc. We know all of that however but how does a slime girl get rid of excess slime when she becomes too big? Exercise doesn't burn slime as if it was excess fat so they can't loose weight that way. Heat does boil slime away but that obviously hurts! and another way to loose slime is for her to get splatted against something hard which hurts too. The simplest and less painful way is for a slime girl to pump her slime in to a human's body. It doesn't hurt the human at all as the slime quickly gets converted in to normal muscle and fat. Slime girls can pump there extra slime in to a human through their mouth or in a male's case in to his cock and balls

Hi all, the tldr version is that I want a slime girl who enjoys using my cock and balls as slime storage making them grow bigger and bigger. I am also willing for her to give me add fat or muscle even tits and butt depending on what your in to