You haven't been married very long have you? As someone who has been married for 43 years, never let them touch your machines, unless, of course, that you know he is absolutely mechanically reclined, in that case - go ahead and ask. The one time I did ask DH for help I was trying to get my button maker to work and couldn't quite get it figured out. I was ready to go to the sewing machine shop where I bought the sewing machine, when he came in and within 3 minutes had figured out the problem. At least he hasn't held it up to my face too often. He is an engineer, so I have to put up with getting a lesson on building a clock when I ask him the time, but about the only thing he has seriously messed up has been plumbing.