I think I was married to him!
Many many years ago we went camping, and as usual Genius split all the little sticks of kindling and got them in the fire pit, and poured about a 1/2 gallon of white gas on it. About the time he got the white gas can out of range a little kid came up and said, "whacha doin' mister?" The ex being johnny on the spot grabbed two of the gas soaked sticks and starts rubbing them together.
"I'm an Indian son, and this is how we build fires" (of course the kid didn't see the white gas). Every now and then for the 3 or 4 minutes he'd stop and peer at the two sticks. "Yup, that's good enough. Stand back son". And he tossed a match onto the kindling - huge exploding ball of fire!!
Little kid exits stage left hollering "Wow, Mister, I've gotta tell my Dad how you build a fire!"