There's a group of people I went to Uni with whom I have dinner with about 3-4 times a month. It's a very casual affair, no fuss, no big deal.
Just yesterday, they set a date for the next meet up, and I declined with, "thanks, but I'm having dinner with my dad that night." The messages that ensued were all along the lines of it being unusual etc, with one even saying, "I grew out of that in secondary school!" 
My dad is fantastic. He worked very long hours and often had to travel as part of his job, but he made it a point to come to every single recital, award ceremony, and even to the parent-child ballet event (he was the only dad there since my mum didn't want to go)!
This is also the person who read every single one of my GCSE and then IB textbooks in case I had questions and it wasn't convenient for me to consult a teacher, so why wouldn't we be close?
Do people really "grow out" of something like this?