B: You shouldn't carry pens in your pocket.

A: Yesterday a pen fell through my pants onto my shoe.

B: Lucky for you it wasn't a sharp knife.

A: Who carries a sharp knife in their pocket?

B: Criminals, of course.

A: Anyway, I have to fix the hole.

B: You can sew it up or use an iron-on patch.

A: Tell me about this patch.

B: The patch has glue. The hot iron melts the glue so the patch sticks on.

A: That sounds a lot easier than sewing.

B: It is. But after about ten washings, the glue washes off.