What nicoleb said rings a bell - I am usually so pleased and excited about something that there's no way he couldn't really 'know' what I spend on clothes and fashion. I love telling my husband about the latest deal I got, whether it's clothes, household items or what have you.
That said though, I manage all the bills and finances. He can easily look at everything, and pay the bills himself - but I normally do it.
In general, I don't ask him questions about what he buys and he doesn't ask me about what I buy either. We can both easily see what we're spending and we're pretty good about not going overboard. I don't hassle him about stuff and he doesn't hassle me about stuff.
That said, we will check in with each other for something more expensive than usual or something that's out of the ordinary. Plus, if it's something that we both have to live with and use, then we'll always seek each other's opinion first before rushing off and buying something. A silly example is me wanting new pots and pans - he cooks too, so I took him shopping for new pots and pans and we bought something we both liked. He wanted new patio furniture, and he showed me what he thought was a good deal and that he thought we'd like etc.
But clothes and fashion? No, not really. Sure, I ask him what he thinks of what I bought, but it's mainly because I want to know if he likes the item/outfit. He doesn't ask how much something cost or how much I spent, but can easily see for himself what we're spending.
We're also a lot like what Joy was saying - we trust each other implicitly to 'do the right thing', and somehow, it all works out. I don't bug him about what he buys, he doesn't bug me about what I buy and we both check in with each other about anything major or anything that we should both have a 'say' in, so to speak. I don't worry about him and he doesn't worry about me.
My DH probably doesn't know *exactly* what I've spent in any particular month on clothes and fashion, but could easily ask or find out. I don't say, "I spent $XXX.XX on __________" or what have you. But then, he's also not doing that either if he needs a new replacement gadget or whatever. I trust him - if he needs a new phone, he needs a new phone. He trusts me, and if I need a new winter coat, then I need a new winter coat - and there isn't any questioning of each other on these types of things.
Just by answering this question, I'm realizing that we're both pretty trusting of each other and pretty relaxed - because we 'know' each other, and that we wouldn't do anything overly rash, without checking in. I trust his judgement, and he trusts mine.
Come to think of it - my DH has never ever even once asked what I've spent or how much something cost.
I don't think he *knows* exactly, but it's ok.
Hope this wasn't too confusing - the short answer is "No, but he can easily see for himself what's being spent and isn't concerned."