You've started fly fishing and become relatively successful, and realise its time to start tying your own flies. You buy a vice or vise if your American, bobbin holder, hackle pliers, scissors etc. You look to materials.....peacock herls a must, pheasant tail, the odd indian cape, marabou in a few colours...olive, orange, black and white. Okay, thats four, but who's counting! You buy some capes, perhaps indian to start with, in ginger (red game) and black. That will cover a multitude of flies. You need some synthetics...oval gold and silver and pearl mylar for sure. A good few threads in various colours, black being the prime colour. See, there's no need for fly tying kits!! It's all coming back! A good start!
When does it start taking hold though?
Are you in the supermarket looking at the packaging perhaps containing crisps and wondering whether your buzzers would definately be improved with dorito's red cheeks? Maybe its B & Q when you spot those lovely red reels of bead chain eyes!

Maybe your visiting a friends house with your girlfriend/wife when you spot that lush olive carpet that might just do the business on your Damsel nymphs...rub, rub, rub with the rubber soles to get a wad whilst you nod and be polite in the company, all the time thinking, what rib will I use to embellish this lovely olive

Christmas shopping.

look at all the possibilites!! Beads, tinsels, glitter, all the flash and then some!
Perhaps your looking at some gorgeous curvy brunette standing before you in the queue to the till, when suddenly you spot her scarf has that deep blue tinsel that you can't source! Its difficult.....your eyes flash between her tight jeans enveloping her curvy ass and that scarf with that deep blue tinsel, which like her ass you'd love to get your hands on!!!
At what point did you know you were totally addicted?
If this seems sexist in any way to female flyfisherladys I apologise, Im a man, enough said, eh!