Sorry, but unless you and your twin exited the womb simultaneously, you DID enter the world alone! In your case, either preceded or followed by your twin.
Interesting that you mention that now antiquated belief system. It is generally agreed that unsanitary surgical conditions are what killed President James Garfield and not Guiteau’s bullet.
Beats someone I used to work with. Gentleman (term used loosely) would use the urinal, not wash hands afterwards and tell anyone who inquired ‘I was taught to not pee on my hands’!
Just so you never run short of patients!