Pro-thought argument: If a man is attracted to women, but has never had sexual contact with them, he is defined as a heterosexual.What we think or what we believe is, in the end, of little consequence. The only thing of consequence is what we do.
Pro-action argument: If a man desires to beat his wife, but never does, then he is not defined as a wife-beater.
I lean to the pro-action side, because definitions are social constructs, meaning in a solitary world it would be impossible to define yourself. Labels (adjectives) only have meaning when you have others to compare yourself to. So if definitions are social, and actions are the only thing society cares about, then it seems to me that actions define us.
Discuss amongst yourselves.