[fiona4281]

You don't need to make the dog sleep outside, apart from anything else it would traumatise the dog. If you keep getting infections it's probably because you have a health deficiency, so visit your doctor for advice. The dog may irritate your eyes but it wouldn't give you an infection, least of all somewhere intimate!
As an edit: If a dog has fleas it's more than likely caught them from a cat. It's true!