Moose lapping it up and putting on a show. What wildlife is after during winter is the salt that builds up on the exterior of a vehicle. Much like a salt block or mineral lick is supplied to horses and cattle to supplement their diet in winter, wildlife does the same. While it may be a great way to get that great shot, allowing wildlife to treat your Porsche like a popsicle is discouraged. The habit may not be good for wild animals and there is a chance it may end up not being good for your Subaru either. Licking shared surfaces may increase the risk of spreading a disease, not unlike a person with a cold offering to share their lollipop with others.