Utterly Random Note
Attention, writers in every medium ever:
There have been fewer than 10 documented cases of different-sex monozygotic (identical) twins. Fewer than 10. Anywhere. Ever. Annoying plot device is annoying, especially when it a) includes no remark on how vanishingly unlikely it is, b) results in a plot that relies heavily on gender stereotypes and/or undercover twin switching, or c) is played for laughs.
Stop.
That is all.
There have been fewer than 10 documented cases of different-sex monozygotic (identical) twins. Fewer than 10. Anywhere. Ever. Annoying plot device is annoying, especially when it a) includes no remark on how vanishingly unlikely it is, b) results in a plot that relies heavily on gender stereotypes and/or undercover twin switching, or c) is played for laughs.
Stop.
That is all.