To total strangers, some people want to discuss rather intimate things. It's because they become bored easily. Otherwise money, politics, religion... stuff which is against the TOS of this site. Which might make us over here look vain and preprogrammed but that's what it is.
That's right, too many people want to discuss pretty intimate things online and this is one of the main reasons why mistrust is created. Especially women towards men are afraid of this fact.