This could be about your relationship with your mom. But I'd need a lot more information to hazard an interpretation: Your age and living situation (with or away from mom?) All the scenes you can remember from ONE dream with these two moments in it, including all the details besides those supposedly central features. What event(s) or thought(s) in your life could have triggered this dream. MY associations to your bare-simple words are Dogs & cats have fleas; and human children in poor countries have lice. Does that feel right to you? or does it trigger you to think something else?