My uncle is 62 yr old and i have been watching his activity for last six months which is not normal.i have seen many times he left the home midnight between 12.30am-2am and lock the door from outside.he is making intimate relations with street bitch and cows. We never asked any questions r egarding this habit ..should we talk to him about this and stop him doing these or he need medical attention...please suggest the right way to solve this problem.