On Mobile just Download and install over the game just like Updating on playstore. Saves are not affected so don't worry.
Breast growth can't be used to torture for now, not from my experience.
Cock Growth is pretty prevalent compared to other skills as of now.
The Hobo, beneath the Dons home, the one who asks for food, give him 8+ to get all of his tips, then to the Slums Market, the junk vendor buy a Shabby ticket, then to the Massage Parlor, get a massage from Lin-Lin, she would then lead you to the Tattoo Parlor, to get a Quality counterfeit ticket, use that on the Gate to get to Upper New Ark.