I do something similar in that I asked my girlfriend to change the password to her Netflix account and not tell me what she changed it to so I cannot use it when I am not with her. When it is time for us to watch an instant video, I put a virtual keyboard on the screen, hand her a wireless mouse and she types in the password while I avert my eyes. (Note that this only helps if I remember to log out of Netflix when we are done for the evening.)

I am aware that many (most?) people are made uncomfortable by restrictions, even ones they chose with an unclouded mind, but I seem to like them if they reduce my need to exert willpower to resist temptation and do not get in the way too much.