You don't...
fabrize anti mildew or baking soda and distilled water then rub with a dryer sheet
well how would you get a urine stain on the couch anyway oh yeah you clean it that's how you get rid of it clean it :):)
With more urine
An outdoor couch is a good idea if you can find outdoor fabric that wont mildew. If thats not possible I would go for a waterproof swing with a detachable cushion for easy washing.
According to EPA site, your best bet is to first wet vacuum the material (possibly steam clean) and then to use a HEPA (high-efficiency particulate air) vacuum after the material has completely dried first. Using a dehumidifier is a good idea too since mold thrives on moisture.
go to a steam cleaners
call the sherif's office Is he out on bond already?
A quality leather couch can be easy to clean since you can often just wipe up any messes, but overall a microfiber couch is the way to go if you are concerned with cleaning. Microfiber is naturally stain resistant so you don't need to scotch guard and to clean it you simply need water and dish soap.
If you are going to wash the covering, put a little dye of the same color in the wash to avoid fading. (I saw this on HGTV)
There are many products available to help you clean your leather couch. Leather couches are not any more difficult to clean than suede couches. You will need to buy a leather conditioner to keep it in good condition though.
A lighter brown
Red or burgundy!