I let a dog nibble on my arm.
Why would you let a dog nibble on you?
See this is the thing, you should always let dogs nibble on you.
I think it's weird and potentially dangerous to let strange dogs nibble at your body. You should probably try to get away from them, or ignore them.
I can't ignore them since they are very fond of me.
Even if the dogs are fond of you, you still shouldn't let them nibble on your arm, because you don't know if they're dangerous or not. Plus, if they break the skin you could get an infection. I think you should stop allowing that to happen.