Why? 50 Dangerous Things (you should let your kids do)
Gavin had actually done this before, Mikey had not, Ethan would not and I told them they were not to go near the baby!
The book gave a good description of the sensation and why it happens. Then it suggested chewing on a wad of aluminum foil, which did not seem to gross out anyone but me. There is also low voltage currency involved.
Dangerous? The kids seemed to think so, I didn't - I had let them do it before. Would you let your kids do this?