Erdem thinks having a twin sister attracted him to the "extraordinary power of the feminine".
Erdem
The 43-year-old womenswear designer - whose full name is Erdem Moralioglu - believes his interest in "femininity" stems from the relationship he has with documentary-maker sibling Sara.
He said: "I've always been really interested in the feminine and the language of femininity and I think that might have something to do with having a twin who's the opposite sex.
"There was always an extraordinary power to the feminine."
The designer loves putting together garments that have a "tension" to them.
He explained: "I've always been attracted to things that have a tension to them and things that don't necessarily go together."
And Erdem believes clothes are a great form of personal expression.
He told Britain's Grazia magazine: "I think clothes are an extension of who you are.
"It's not different to when you're a teenager, frustrated and trying to express who you are. Everything is a bit of a clue."
However, the designer insisted he doesn't pay much attention to his own outfits.
He said: "I look at so much visual information every day, I very rarely think about what I'm wearing."
Erdem thinks it is a "tremendous privilege" to stage fashion shows for his eponymous label because it is a "great power" to be able to transport an audience somewhere else for a short period of time.
He said: "To take an audience somewhere for eight minutes is a great power.
"To have that platform as a springboard to create a world for just a short period of time and to get to say something every season is a tremendous privilege."
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