Inappropriate vs Just Plain Funny

I was recently doing a little horse tack-shop shopping, except not for Natural but for the three hyenas in the field.  Going to try some fly boots (made for ponies) and see if we can stop the hordes of flying pests landing by the thousands on those little legs.  As I was noodling around the website, I came upon this t-shirt.

Now how many times do you see a miniature donkey on a t-shirt.  Of course I had to get it!
And, I wore it to our annual weekend at Camp Michigania by Petoskey.  Rick's comment -- "how inappropriate".  However, none of the other 100 or so campers seemed offended.  In fact, friend Barbara broke into a big grin when she first spotted it.
So I ask you, inappropriate, or just plain funny??