How Long Between Bike Purchases?

[sundial]

So, if you have more than one bike how long was it between getting another bike? How did you justify getting another bike?

I bought my first carbon fiber zoom-zoom bike in '07. Then added a mtb that same year. Sold the mtb the next year and upgraded to a full suspension mtb. Decided I needed a touring mtb and bought one in steel. Then my zoom-zoom bike got rear ended by a car when it was on the hitch mount bike rack and after the insurance settlement I ordered a new road bike--in light weight, OX Platinum steel.

I've often thought of reducing the number of bikes to just 2 but I always find a use for every one of them.