Why am I craving fattening foods?

I’ve been working out a lot lately. Feeling good but, I suddenly feel a craving for fattening foods. I never had much of a sweet tooth, and the thought of greasy or fatty foods make me nauseous. Nothing I normally eat seems to satisfy me. Its getting really hard not ignore cravings for sweets. Fruits are just not cutting it. Its not that I’m on a diet. I continue to eat what I normally eat. I’ve had cravings for foods that I may be lacking in but I don’t understand why this craving for fats, when I don’t like them?
I’ve never had this happen to me before when I would work out.
Can it be because of the work out. Maybe a need for fats for energy? Or is it simply its different because I’m getting older?