Someone once told me he thought I had an ax to grind. I told him I didn't own an ax, but if I ever found myself in possession of one that needed to be ground, he would be the first person I came to. He looked at me suspiciously, and stomped away moodily. After that reaction, I changed my mind about taking him up on his offer of ax grinding services. Some people just aren't very good at marketing and customer service.