Yes, some things you shouldnt tell the person youre dating because its really not important! Some things are best left unsaid. You wouldnt want to turn off the person youre dating to the point they determine theyre really not interested in you after all! So, here are some tips that may assist you in not discussing certain topics with your date that you dont need to:
1) Never discuss with your date your past boyfriend, girlfriend or former spouse! This is a definite no, no. Noone wants to hear about how great or bad your past girlfriend, boyfriend, or former spouse was! Dont dwell on the past. Your new date might think youre trying to make them like your past date or spouse, and this may be a turn off for them!
2) Dont talk about how much money you have or lack of it. This may come across to your date as your way of telling them that money is the most important thing to you in a relationship. This could be a relationship ender for you.
3) Gossip about your past dates, friends, family or whomever is not a good idea. Its really not important for you to discuss this with your date. Some people see others that gossip as busy bodies who have to be involved...