I don't know. I guess I don't see the point in hiding 'fact of life' things from kids. But then I basically grew up on a farm around horses and other animals. <shrug> My wife raised 15 kids (her nieces, nephews, then grand nieces and nephews) and has the same attitude.
Guess what I'm saying is if your kids never see anyone kiss, hold hands, have a beer, have a smoke, have a vape, drink a cup of coffee, laugh, cry, eat potato chips, drink a soda, chew gum, whatever your, "Oh, this is bad for you, you should never do it." things are and then they hit 18 and are supposed to automagically be able to deal with the big wide world, they're not prepared. As a TA in a university, I see it and it makes me cringe every time. But there's nothing to be done when they hit 20-21-22. It's too late to give them 'life immunization' by that time.
But it's your choice. I'd say if you want guaranteed nasty that will make sure you don't vape, then just go to the nearest head shop with the cheap Chinese stuff and get whatever flavor you think will make you gag. Pretty much anything I've gotten close to from that source is gross. If you want to teach your child how to deal with the choices people make, then let him see it. He'll learn that sometimes even dad makes bad choices, but he'll also see you dealing with the consequences and behaving in an adult way to make things right.
It's not like vaping is going to hurt him, unlike second hand smoke. Oh, sure, there are all kinds of 'studies' about x or y or z. Whatever. Don't breathe on him either, since there are all kinds of toxic chemicals in human breath. Or feed him tomatoes which contain nicotine. Or let him play in the dirt, since it has radiation and fungal spores and necrotic bacteria and ...