You have more than 1 bike per person in the household.
QFT, we have 4 bikes for 2 people. My 'Hybrid' bike that's been taking me to work since march 2013 about 90% of the time, my 'new' $45 1989 Raleigh I got at a yard sale (I hit 35pmh the other day!), and two 24" bikes for my wife, one she's had since highschool, and one was a $15 yardsale purchase.
Oh man...I've got 3 bikes and it's just me. I guess this belongs in this thread because some friends came over after I moved recently and almost had a heart attack when they saw I had three bikes. Well, they are super-spendy on clothes, jewelry, purses, and shoes, so I don't think they were judging me. Then they were trying to convince me to buy a scooter since I am in a fun/touristy area and thought it would be a good way to get around. I said I wouldn't want a scooter, as walking and biking were fine.
One bike was purchased in 1994 or 1995 and it's a hybrid. Works great and have used it to go to work.
The other is an entry level road bike (reasonable price) purchased in 2006 when I got into road cycling.
The third is the decadent one I purchased recently - a super pricey carbon road bike in order to keep up with everyone else that has a carbon bike (face punch).
At this rate, I seem to be acquiring a new one each decade. They all have their purpose.