Philosophy Essay on Hume's view

I need great help in writing an essay. The topic is on:

Hume believes that moral knowledge is based on feelings, not reason. Explain at least one problem this causes for Hume's view.

I was researching for days and I figured out what his feelings thing is, but I dont know what the problem is. Can you help?

Greetings!

I can give you some ideas that I think might be applicable. If one's morality derives from personal feelings, those feelings may be affected by many factors. Past experiences may color our views of what is right and wrong. If a person has suffered some traumatic event, that person's feelings may have become altered in a negative way, and therefore, his or her view of morality as well. Using reason would rely on logic, rather than on emotions, which are variable and sometimes irrational.

I hope this helps!

Thanks,

Sarah, EssayForum.com