I thought you were saying that individual people chose to signal their sex. I think from this post you are saying that it is society which makes this decision by dictating what is deemed to be appropriate clothing for each sex. This is obviously true in most societies (I say most because I am not ruling out the possibility that either now or at some point in history, somewhere in the world, this isn't/wasn't true).
In western culture individuals do choose their clothing and most choose clothing which signals their sex by conforming to the cultural norms for that sex. Society doesn't 'dictate' what people wear, people are society. We signal to each other all sorts of thinsg through our clothes and fashion evolves. We are mimetic and communicating through our clothing.
Hardly anyone in the UK wears african dress, or a crinoline skirt, not because it's banned or because it's dictated but because it's not the norm and we know that, and we respond in a human way to the norm. Humans are social group animals, we're not autonmatons beiung dictated fashion by a tyrannical committee.
I suspect you wear fairly average western style clothes (I could be wrong, but odds on I'm not) is that because you just happen to like the clothing that is normal for this time in this culture, what an amxing coindcinece. or did someone dictate to you you wear that?
Neither, you have chosen clothing which fits within the current norms as you aware what that is and you choose to conform.
I even suspect you wear women's clothes. (I may be wrong) Some women do wear mens' clothes and of course yuo can still tell they're women, but it is unusual. Even neutral style clothing is diffrent in some way. I'm wearing joggers and a sweathirt right now, as is my husband, but if we were to just swap styles there would still be something off about it.
Clothes are comminiating all sorts of things, and as most people choose to conform to norms for their sex one of things communicated is our sex. There is a reason for this, deep abiding human group behaviour reasons, whihc makes it highly likely it will alwaeys be true. As it always has been.
It's things like this that put me off, not your one off post.