I find I can talk shit to people from other generations really well - partly I suppose from work, but also because I feel like it doesn't matter what opinion they form of me. Whereas people at, say, baby group, who I would like to get on with, and form friendships with, and therefore care what they think of me - clam up. Cannot think of what to say.
My brother is worse. A friend and his gf invited my brother to go snowboarding with them, and another girl, during the cold snap. Clearly in an attempt to set them up. My brother and this girl were stood on top of a hill, alone, and he said nothing to her, not a single word. The longer the silence went on, the less he could think of to say. Now I'm sure none of us on here are that bad judging by the number of threads we get through anyway