As ridiculous as it may seem Strawbs, Angel Clare might not be too far away from the truth.
I'm no expert - like Angel Clare claims, but film-makers, writers and directors look at things like that, admittedly, the jury is still out on the cup of tea theory for me, but the white t-shirt / gay / Marlon Brando might hold water.
Writers want the audience to engage and recognise gay characters by putting them in costume like that so the audience will identify with them immediately... without dressing them as Daffyd (The only gay in the village.)
This has come up in Bar Stewards, our Director of Photography (Paul Gordon) asked Birty to throw a towel over his shoulder when shooting a scene behind the bar...
Now barmen these days never have a towel over there shoulder, and you never see them drying a glass behind the bar - industrial glass washers have done this job for years, - but when you watch EastEnders or Corrie - you still see characters (normally men) working behind a bar with a towel over their shoulder.
So people who have never seen the character before will know instantly - he works behind a bar.
Also have you noticed, builders in soap opera's normally have a pencil behind their ear...