My son who is now 15 used to love trains and anything to do with them when he was little. He had a couple of railroad crossings amongst the many trains he had, he couldn't say railroad crossings so he called them ding, dings, for the noises they made when they went up and down.
Anyway, one day I took him to get his hair cut, while getting his hair cut he begins to tell the lady about his ding, ding and how it went up and it went down and that his daddy had a big ding, ding that went up and down also, I thought I would die, then trying to explain what he actually meant, don't know if she believed me or not!!
Debbie