I think it is due to the weather!
Today, quite mild here if you step out of the wind. If you step into it (as you will) and walk for any distance it cuts right through to your bones, intolerable.
So we went out for an hour's walk, padded jackets and wool hats. A bit depressing in April, but nothing new. I came home with something like a splitting ear migraine, it had cut right through my rather fetching little cashmere bonnet like a scythe 
I don't run a vehicle at the moment, so it's good fun trying to determine how to clothe oneself when the bright, warming sun might topple out of existence 5 mins after you've rummaged around for an hour in the wardrobe, finally settling on a decent dress and light jacket.
Birkenstock sandals? But what if it rains!?
The care instructions advise you not to get them wet, perhaps they are volatile, like gremlins..
To carry an umbrella or not? Mmmm, decisions. Sometimes I might need to employ a well sized sack for all of those weather associated accoutrements I shall require - brolly, hat, gloves, mac, small tent 
During the early springtime of 2013 I noticed more than one individual wearing plastic bags between their socks and shoes. This was the Lake District though.
So maybe this is why we dress as we do, we don't have the most laid back weather, it's so insanely changeable. Any decent combination of clothing can turn out to be wholly inappropriate in a heartbeat.
I wonder if that changeability affects our sense of style, our moods and expectations. People often seem more impatient and agitated on windy days. Aggressive even.
So it usually ends up being some sort of trouser/top/coat - men and women.
It's just safer isn't it?
I am a dress wearer myself, so today's swingy number tried blowing up my back for most of my time outdoors, thank heavens for thick tights!
I love living in a country with seasons, but they rarely behave as we expect them to, do they? I also love clothes, and I have come to the conclusion that we either obsess over our wardrobes to a shocking degree (and who could blame us?) or just give up entirely.
I am NOT being unreasonable!