Thanks for your question. HPV or Human Papilloma Virus causes genital warts in affected people. It is very commonly seen nowadays among young adults. They are incurable in nature and are caused by a variety of 70 or more types of viruses. They are differentiated by the area in which they are affected. Some affect skins of hands and feet while some others affect genitals causing genital warts which look like cauliflower. Those causing genital warts are more dangerous than other counter parts. They can be spread through nicks and cuts in skin when you walk barefoot in areas where the viruses are present. So, simply your warts can be spread to your girlfriend while having sexual intercourse. Anyway she will not be at a high risk of getting affected, if her immune system is healthy enough. Many types of genital warts stay dormant for years without causing any symptoms. But even at this stage they are prone to getting spread to others who engage in sex with the affected person. Hygiene and use of condoms will help in reducing risk of getting affected with HPV infections. Hope your query is answered. Take care.