Everyone has their private parts, no one else is allowed to touch them.
A child is in control of its private parts. What underpants and swimsuits cover are private parts. It is allowed to say no if someone tries to violate the rule about private parts. If someone violates the rule about the private parts, the child must tell some adult, who it trusts, about it or call 112.
It is never the child’s fault if someone violates the rule about the private parts.