He said earlier he doesn't have one.
Its an American thing over 80% of them have no helmet. Every year a percentage of these poor babies will become infected and suffer deformity or worse.. and yet they continue with it, the idea is its cleaner. Even if it prevents a minute percentage of children from getting a urine infection (which is easily treated) this does not offset the risks.
Plus a baby can't consent to it which is quite a big thing when you consider it causes a loss of sensitivity.
Bet you weren't expecting that answer