Talking to a stranger

Do you always talk to stranger? How do you find talking to them..comfortable or uncomfortable? What if you dont know their names and start talking with them..do you think its wise to talk to them? What should a stranger do before talking to you....introduce ..right? Well I notice not many want to introduce but they like to talk...I think that is how a stranger are and will behave...friendly but unknown! They are good in striking a conversation..something that people like to talk...its a strange world and strange character of what a stranger are capable with..somehow I wish you would at least introduce yourself...make me comfortable to whom Im talking too..