[post_page_title]Speaking from experience[/post_page_title]
One twin waded into the discussion and said marking twins is completely normal. They said they knew twins who had their big toenails painted, including themselves. The person thought it was fine for the wife to object to the father marking their children’s skin, but she should chill out a little.
This commenter was also pretty sure that in any household where twins were brought up, there was some system in place to tell them apart. Telling twins apart is important to prevent them from accidentally having mistaken identities.
