Exactly. It's hilarious and you need to stop worrying about bubble wrapping kids if that's going to be the excuse. Let's say a family is just walking by his car on their way in to Dollarama and the 5 year old looks over and sees this and makes a comment...do you really think he/she/it is scarred for life now? My youngest is 10, if he saw something I'd be completely straight with him and tell him that some men get lonely sometimes, so what they do is pretend that their penis is a magic lamp. They rub it hoping a genie comes out and grants them the wish of getting a girlfriend or boyfriend. But really, he should do that at home and not in a parking lot.
Done. Crisis averted.