I hope one day you can add small penis and big penis if man has small penis there is a very Hight chance to get locked in chastity (chastity device, cage) if you are submissive 100% the chance will be instant, the more you wont obey them the more your penis will stay locked up if it is locked up too long like 2 years or more it will shrink then it will be just a model nothing else ruined tiny penis only to be stepped on or tortured be your wife, master. you can add a feature in future to be a slave or master and obey they will humiliate you or do anything to you.
and it will be optional just like all fetishes.