A Canadian couple's kinky role-play session ended with a woman being taken to the hospital with handcuff keys got stuck inside her.

The couple, identified only as Jason and Michelle, were in Van Nuys, California, when they decided to role play that she was a beautiful princess and he was a fire-breathing dragon, according to an episode of TLC's "Sex Sent Me To The E.R."

Handcuffs were involved. During the course of their role play, the keys to the cuffs were placed inside her vagina, and became lodged inside her uterus, prompting a trip to the emergency room.

At first, Jason and Michelle kept the details under wraps, not wanting to embarrass themselves. But the E.R. doctor was unable to find the source of Michelle's discomfort, she spilled the beans.

"That snapped me," she said. "I'm like, 'Okay, this is the situation. This is why we're here."

Emergency room physician Dr. Michelle Pearl didn't handle Michelle's case, but she says it's not uncommon for people to place different objects in the vagina.

Still, keys are a new one for her.

"I'd obviously never recommend anyone do anything like this even if your judgment is impaired in the moment of passion," she said.

The risk of danger depends on where the key is, she said.

"We're talking about a jagged metal object in a very sensitive place," Pearl said. "On top of that, if there is any tearing, you may need surgical repair."

The doctor examining Michelle did a probe and discovered the key was next to her cervix, but there was a problem: It was tangled in the nylon removal strings of her IUD, a contraceptive device implanted in the uterus.

The doctor fretted that untangling the key from the IUD strings might remove the device.

The situation boggled Pearl's mind.

"The fact that this key got entangled in these strings is so random, so unbelievable," she said. "I can't believe it actually happened."