Well, I kind of agree with you, but also what I intended to say is that I think most pick up drivers don't feel masculine enough, whether it's due to a small dick or something else making them feel like they aren't "real men", so they compensate their insecurity by driving unnecessarily large cars.
Yeah, I maybe should have left the dick part out. A man can have a small penis and still not be insecure, and a man with a huge one can still be insecure about their masculinity and try to fix that insecurity with a stupid truck.