Does one who inserts a pen into his anus qualify as a homosexual?

Regret is repentance, and repentance that fulfills its conditions is accepted, Allah willing. You have mentioned some means that help lower the gaze and avoid watching pornographic films, as well as some means that help abandon the bad habit. Sodomy is the insertion of the glans into a male's anus. As for inserting a pen into the anus, it is less than sodomy, though it is still forbidden.