According to Clark and Mills, there is such thing known as
communal relationship. In this kind of
relationship, partners are concerns with each other, care for each
other, etc. all out of love. Partners do not keep track on how much
they give or take from each other. They are not concern about their
own needs. Hmm
is it good or bad? 
Okay here is the reason
why you should not ask too many personal question on your first
date
Now the interesting part is their studies show that
strangers who are keen to establish an altruistic
communal relationship signal this to each other by not exchanging information about
themselves
(Miell & Dallos, 1996, p291)
This is indeed very strange. I thought exchanging information is a
sign of friendliness? Isnt the more questions you ask about the
person indicate that you are interested to know him/her better?
Maybe what happen here is that you are trying to tell the other
party I like (am interested in) you for who you are as a person.
Thus it is not necessary for me to know too much about you
yet.
I believe this concept is only applicable during the initial stage
of a relationship. During later stages and for intimate
relationships, this might not work. So guys for the time being
during the first couple of dates, back to the topics on weather and
what do you had for breakfast this morning? 
P.S. I dont ask too many questions about my friends lives too. It
is something we agreed upon. 
-------------------------------------------------------------------------------
Reference
Clark, M.S. and Mills, J. (1979) Interpersonal attraction in
exchange and communal relationships, Journal of Personality and
Social Psychology, vol. 37, No. 1, pp. 12-24.
Miell, D. & Dallos, R. (1996), Social Interaction and Personal
Relationship, The Open University, Walton Hall, Milton Keynes MK7
6AA
