A Swedish couple's decision to keep their toddler's gender a secret is stirring debate, especially now that the parents are expecting a second child.

"Pop" is 2 ½ years old, but so far only those who change the child's diapers know whether the youngster is a boy or a girl, TheLocal.se, an English-language site for Swedish news, said last week.

Back in March, the parents gave an interview to the Svenska Dagbladet newspaper, saying they decided not to reveal their child's sex because they believe gender is a social construction. "We want Pop to grow up more freely and avoid being forced into a specific gender mold from the outset," said the child’s mother, "Nora." (The paper used fake names for the entire family to protect their privacy.)

"It's cruel to bring a child into the world with a blue or pink stamp on their forehead," the mother said.

The parents, both 24 years old, said they never use personal pronouns when referring to the child. They just say "Pop."

The tot wears everything from dresses to pants, and Pop is usually the one who decides what to wear on any given morning. Pop's hairstyle is also changed on a regular basis, so it doesn’t provide any clues.

Swedish gender equality expert Kristina Henkel told The Local that the experiment could make Pop a stronger person, since he or she won’t be subject to gender stereotypes.

By The Who:

I'm A Boy

(Pete Townshend)

One girl was called Jean Marie

Another little girl was called Felicity

Another little girl was Sally Joy

The other was me, and I'm a boy

My name is Bill and I'm a headcase

They practice making up on my face

Yeah, I feel lucky if I get trousers to wear

Spend ages taking hairpins from my hair

Chorus 1

I'm a boy, I'm a boy

But my ma won't admit it

I'm a boy, I'm a boy

But if I say I am I get it

Put your frock on Jean Marie

Plait your hair Felicity

Paint your nails, little Sally Joy

Put this wig on, little boy

Chorus 1

I wanna play cricket on the green

Ride my bike across the street

Cut myself and see my blood

I wanna come home all covered in mud

Chorus 2

I'm a boy, I'm a boy

But my ma won't admit it

I'm a boy, I'm a boy, I'm a boy

I'm a boy, I'm a boy, I'm a boy, I'm a boy

I'm a boy, I'm a boy, I'm__ a__ boy__