Hello Thanks for query . White dots on penis that you develop after unprotected sex with your wife are mostly due to allergic reaction to vaginal secretions of your wife who is likely to have infection . I would suggest you to consult her to qualified Gynecologist for clinical and per speculum vaginal examination and get swab test and culture of her vaginal secretions done to rule out infection . Both of you need to take antibiotic like Augmentin and Metronidazole twice daily for 5 days . She needs to clean her vagina by Betadine vaginal solution twice daily . Ensure to clean your genitals with warm water twice daily. Dr.Patil.