for maximum inconvenience
We have one car here, and one bike, and strictly speaking they both belong to Leah. But I use them from time to time, the bike to bike around (getting out of the house every couple days is good for me) and the car to drive her to work and pick her up. This sharing is done according to a strict schedule, by which neither of us is allowed to use either car or bike twice in row; this ensures that every time either of us wants to use either conveyence we have to adjuct the seat and mirrors/helmet strap (the latter depending on the particular mode of transportation being employed. It's a complicated system, but it works for us.
On an unrelated note, Leah worked til 12:30 last night at the party (where, you should know, I bought not one not two but three garments, for prices too low to turn down), and then she had to open this morning, and even worse she had to go to the gym even before that!! So she only got about four hours of sleep, and I did barely any better. So now it's our bedtime; and in fact I think she's already asleep, unless my noisy typing is keeping her up. So I'll stop now.