Do you buy your kids presents just because?

[MonstranceClock]

I was out shopping with some friends this morning and picked up a toy and some books from my daughter. I got loads of questions about why I'm buying her presents when her birthday isn't till August, why would I spoil her like that, wish they had money to waste blah blah blah.
Is it really unusual? My parents used bring me back things that they had seen if they knew I would like it. I didn't see any harm in it but they really pissed me off!

I was coming on here to say YANBU, they should mind their own business, if you've earned the money you can spend it however you like... etc. But then I read your update:
This present was a little more expensive than what I would usually buy but I've just had my student loan in and I wanted to treat her!
Maybe they think you're frittering this loan away & will be without enough money to live on before long... ?

Not really, but my DS was never particularly into ‘toys’ when he was younger, books came from the library or charity shops & most of his clothes were hand-downs. I’m another one who just can’t stand materialism and the amount of ‘junk’ that can really build up. But we put plenty of money into pensions/savings accounts for our DS so now at 18 he already has a very decent pension pot so he’s in a very fortunate position.

Yes, I buy my three random stuff if they want it or I think they’d like it. Not every time - DS3 comes to Tesco with me multiple times a week, I’d be bankrupt.

I sometimes buy bits just because bit usually only as a bribe. Will often get books.

They get pocket money though, generous pocket money for their age. Which they can spend when and how they want. Helps me manage expectation.

Yes I do it all the time. On Saturday I bought my teen son some sports clothes as a gift. I went to his favourite shop and then I hid the bag in his bed for a surprise. I often buy the children gifts of toys and books and love to give them presents. I got lots of gifts when I was a young child but nothing much as a teen so I sometimes overcompensate for things with my older children.
You sound lovely OP.

Yes - DS birthday is in early January so birthday and Christmas are a bit lumped together, if we didn't then by autumn he wouldn't have age appropriate stuff.

However it's easy to overdo it. I try and make a point of not getting something every time from the museum shop. But he probably has too much stuff tbh.

Very occasionally, once a month maybe, I'll buy them a little something but never spend more than a few quid. If they're with me and see an item of clothing they like I would treat them too. But it's Xmas and birthdays for anything over about £20! I feel a bit mean now reading this