Treat it like regular ripped skin and let it heal for a couple weeks. Don't rub, nibble, or do anything else to aggravate it. It's very hard to tell what's going on based on your description, so if you're really concerned make a trip to the doctor. I'm pretty sure he'll tell you the same thing.
Maybe he was just a little too turned on and it accidentally got a little rough? Like maybe a tooth scraped the nipple?
no im to young to have anything to do with milk.
a Rip? Could it be a large milk duct?