You could have at least ironed them

A little girl is visiting her grandparents. Her grandma tells her to go brush her teeth, and put on her pyjamas. The girl brushes her teeth and hops into bed, but completely naked. Grandma is quite taken aback, and asks the girl why she's not wearing pyjamas.

"Oh, I am wearing pyjamas! They're the special environmentally friendly ones" the girl replies, with a wink.

Grandma decides to take her chances. She gets into bed, butt naked, and cuddles up to Grandad.

"Why are you naked?" he asks.

"I'm not naked, I'm wearing those special environmentally friendly pyjamas" she says,.

Grandad shudders. "You could have at least ironed them."