Why?

1. Why is it that urination is infectious? When you see me peeing, you suddenly also feel like doing it!2. Why is a yawn always infectious?3. Why do we duck when an insect hits the car windscreen, yet we know very well that it cannot get through?4. Why don’t men mind when a beautiful lady coughs near them, yet take great offence when a fellow man does the same? (The germs are the same, silly!).5.