Together we have two (or more) of several things.
Like Ram 3500s. 'Cats, TRXs, V6 Challengers, Kubotas, Can-Ams, and JD Gators. On the surface that may not make any sense, but in real life it kinda does. Each vehicle has its purpose.
For example, if I'm on the road picking up a car (most likely hers) and a horse needs to go to the vet asap, she needs to be able to tow her horse trailer. And my two tractors can do things her two little ones can't, and so on.