[M/Fu4A] Size Theft: how much I should steal from others?

it’s a simple in character rp. would love to talk about my character (fu or male) be able to steal sizes (height, dick, muscles) and talk about it.
But also talk about how much at once or in general. how much I shall grow? is there a limit are minimum? shall I share my size with you? wanna also grow bigger?

We could also set up a RP in which I’m the size theft and Steal sizes for us. Just make the first message interesting for the in character or make it clear you wanna play a normal rp with my abilities.