Are you truthful or agreeable? See details.

So it’s pretty safe to say that most of us here have very strong opinions. What do you do when those opinions come up in conversation?
Do you state how you truly feel and prepare for a disagreement, or do you just agree with the other person in order to avoid any ill feelings?

My SO and I always get into an argument about this, especially when people ask us why we don’t have have kids or why he is 28 and not yet a father. I, being the person that I am, am glad to tell people to shove it and stop trying to change our minds no matter who’s asking. He on the other hand will go into the whole “one day..we’ll think about it.. blah blah” routine. Drives me mad!!

So back to you guys =) how do you handle situations like that?