I had a roommate we’ll call Kevin. Kevin was very smart, and in his head, he was even smarter. So much so, in fact, that it was simply a given that anything he thought of was a smart idea, since he thought of it and he was so smart.
While we were roommates, Kevin got into comic books. He bought a lot of comic books. Now, the arrangement was that I would write a check to him for my half of the rent, since I had accidentally bounced a check before we moved in, and I was still a little nervous about that, and would rather have bounced a check to him than the landlord. so I’d write him my half, and he’d write the check for the rent. No problem.
One month he bought many many comics. In fact, he spent his half of the rent on them. I was not happy about this and told him he’d better get his half pretty quickly, and gave him my half. You can all see where this is going - he then spent MY half on comics.
(Incidentally, he wasn’t buying Detective Comics #27 with all this cash, he was buying crap that would eventually wind up in quarter bins, but he was paying 2x cover price for, since this was in the middle of the raging speculator idiocy of the early 90s.)
So Kevin scrambles with all these different savings accounts and bonds he has and is able to pay the rent, but since he’s doing all this transferring of funds at the last minute, the check bounces.
I eventually told him that from now on, he’d pay me his half and I’d pay the rent, and if he didn’t have his half, that would be okay, because I knew places that bought comics. We didn’t have any problems after that.