spray him/her with water (like a Windex bottle but make sure its washed to not let chemicals go in its face) or slightly move him/her because it's like a habit just like for people.
It is a dog's nature to lick its crotch. The dog is just cleaning itself, so relax.
If your dog is licking the girls, you need to stop the behavior. Gently, but firmly tell the dog no when it does it.
Get him neutered
It is simply a bad dog behavior.
castrate him
Smother them in vegetables and vinegar.
Maybe the dog ate all of the peanut butter.
This is normal, this is how they clean themselves. If, he is constantly linking there could be a problem, take your dog to the vet.
Train the dog to stay off the bed.
Your dog is not going to get sick from licking a cat's butt. Animals are always licking their butts.
Dogs that lick excessively are nervous.
You can get your pet a cone for around$10-$15, it will prevent dog from licking stitches. (My dog licked her stitches and got 4 staples with no anesthesia)
Call Dr. Harry