What I think about when I am at Buxton's

Today I was in the car with my dad, listening to Elton John*,and we drove past this antique shop. I said "They have nice stuff in that shop", and my dad looked at the shop, looked at me, looked scornfully back at the shop and said "I've never gone in there." He said it with such utter conviction that I find it hard to believe he was consciously lying. But in was in fact a total lie. I've been in that shop with him, at least twice, and stood around irritably while he bought a painting. But if me and him were in court, and he said in a Grand Voice, "I have never been into that shop", and I said, "ooooooooooooooooh, yes he has yes he has yes he has he bought a painting and now it is hanging above the piano in the lounge for Christ's sake," the person that the judge would believe would be my dad. Definitely.
Now. Is it because he is a lawyer? Is it because he is a chap? Is it because I am his daughter? I have been thinking about this all day. Because I know that sometimes I will say something with a lot of conviction, like "My worst is to swim" or "my best is to only eat sweets from dawn to dusk", and it will just be total bullshit, but whoever I am talking to will listen, and believe me. And worse, they will remember, and bring it up at some later and humiliating date. Now. Why is this? What does it mean for my Future?
This is what I have been thinking about while walking around Buxton's in a bit of a trance, forgetting to buy half the things on the list.

* Even though I have known this my whole life, it still totally bewilders me that my dad likes Elton John. It's like when I found out that Simon liked Bjork. It made me reevaluate every single thing I knew about him. Sometimes Simon will do or say something a bit sort of different, and when I remember to, I think "this must be the part of him that likes Bjork".