I already shared a uterus
with my TWIN sister.
The Big Bang Theory Season 12, Episode 19
"Made up my mind to date both of them
by pretending to be TWIN brothers."
The Big Bang Theory Season 9, Episode 14
but when they're TWIN primes,
The Big Bang Theory Season 9, Episode 12
I have a TWIN sister
whose assaults began in utero.
The Big Bang Theory Season 3, Episode 17