I'm an only child aged 30.
Last couple of times I've seen my dad I've noticed his phone background is of me...as a baby. I was a bit taken aback.
Previously he had a photo of me aged about 18 which was also annoying but I could live with it. Don't get me wrong...I was a very cute baby 🙂 but I feel odd every time I see it.
He joked years ago how much he missed me being a child. I think it's just because I am strong minded and answer back now, plus I spent more time with him then. I can't exactly tell him to remove it but I don't like it.
YABU - it's fine
YANBU - it's weird