Here is a case of someone who is at their wits end. I bet you that if this issue isn't resolved in the next week, you will see a posting for a free 15 month old siamese cat.
So this cat howls at 3am. Every night. The owner gets up, feeds him, plays with him and pets him at 3am to quiet him down ... Then he/she takes the cat to bed so he will stay quiet for the rest of the night.
Then she can't figure out why he's doing this ... *headdesk headdesk*
Perhaps because he's spoiled and doesn't know any better? Perhaps because you're rewarding him when you get up at 3am with him? I wonder if he's neutered? Doesn't say. Maybe he's randy.
Anyone want to take a stab at it?