They say twins have a particularly close bond, but these two take it to the extreme.
Not only are identical twins Anna and Lucy DeCinque together 24/7, they also share a house, a mobile phone, and even a boyfriend.
Now the Perth-based pair want to get pregnant at the same time, as the twins say their bodies "need to be the same".
Talking about their bizarre bond on Australian chat show, The Insight, Anna said:
"If I got pregnant, Lucy would definitely get pregnant straight way - because our bodies need to be the same.
"We would try to make that happen, definitely. We are not trying right now - we love children and kids love us, but it's not the time for us.
"We would have to be exactly the same - even if we went through IVF at the same time."
The 30-year-olds have already had cosmetic surgery to look exactly alike.
In another twist, the pair's boyfriend, Ben Byrne, is also a twin. "So he understands the twin thing and the very close bond we have with each other," Anna explains.
At least someone gets it.