Gay Incestuous Masturbation
. It is gay
because it is the same sex, it is incest
because it is the same blood, and it is masturbation
because it is your own body. There are only two known ways to ginsterbate: (1) Cloning yourself and having relations with it or (2) traveling time and having relations with yourself.
Identical twins cannot ginsterbate. They could have gincestuous relations but Jim and John are two different people.