Okay, maybe I'm just old-fashioned, but this deal just doesn't seem reasonable. From your other thread, it looks like you are struggling to accept her wish to date another man. Can't you at least look at pictures of naked ladies on the internet?
If you are not categorically veto-ing her other relationship, she should at least make a good-faith effort to not veto your solo sexual activities, which I think you should be able to practice as you see fit.
I don't want to be seem as too hard line about this, but... can't we be considerate of each other's sexual needs here? Must we shut our partners down like this?