I am the stepmother of a 17 year old son. His father and I have only been married for 2 years. The fathers divorce was VERY acrimonious and the mother has custody. My son is having issues with lying, stealing and boundries and impulse control. But the most disturbing problem is him urinating in cups and glasses and leaving them out. I always find them in the exact same place, by my computer which is in my office basement. He does not leave the urine filled items any where else in the house. He has been doing this since I first met him, when he was 14. We have 3 bathrooms in the house. At first I thought it was just laziness. But now it is starting to seem as if it is deliberate, as I notice it more when something upsetting is going on with him(even if it has nothing to do with me). For example, he was suspended from school yesterday. When I got home from work, I noticed that there was a cup of urine next to the computer. I have also noticed that more often than not, it is something that belongs to me or my daughter(19) that has been urinated in. Are these acts of agression? Lately, he has been blaming me for being "hard on him". Should we take him to a Dr?