A passenger demanded that female attendants help him remove his underwear and wipe his backside when using the bathroom on a flight from Los Angeles to Taiwan, according to Taiwan News.

One of the flight attendants involved, known as Kuo, broke down in tears while recounting the incident during a press conference calling for a change in policy.

Kuo said that while being assisted, the passenger moaned "deeper, deeper."

A union based in Taiwan is calling for changes to airline policy after an incident in which a passenger aboard an EVA Air flight reportedly demanded that three female flight attendants help him wipe his backside after using the bathroom.

The incident occurred on Saturday on a flight from Los Angeles to Taiwan with an all-female crew onboard.

One of the flight attendants broke down in tears while recounting the incident at a press conference with members of Taoyuan Flight Attendants Union on Monday.

According to the flight attendant, about 2 1/2 hours into the 14-hour flight, an American man said he'd injured his right arm and needed assistance getting on and off the toilet seat.

'Come in and help me take off my underwear'

Within a minute of entering the toilet, the passenger asked the cabin crew for help to remove his underwear, which he had already pulled down halfway.

At one point, a crew member put a towel over his groin, but he violently slapped her hand away, she said during the press conference.

According to Kuo, he told them at the time: "I don't need this. Come in and help me take off my underwear. I need to use the toilet."

A short while after, he requested for the door to be opened as he felt breathless — but the flight attendants refused.

After he'd finished relieving himself, he told Kuo to enter and wipe his backside for him. The flight attendants were thrown into an awkward situation as there were no male crew members to help, and they could not leave the passenger in the position he was in.

According to Kuo, the man said she had promised to help clean up earlier. Although she denied doing so, he insisted she had to help him. The chief attendant then helped him with the wiping while Kuo supported the man from the front.

'You better have cleaned it properly'

Kuo said that the man then moaned and said "deeper, deeper" and that, as he was not convinced she did a good job, he made the chief attendant repeat the action two more times.

"You better have cleaned it properly," he later said, according to Kuo. He then told her to put his underwear back on for him.

Kuo wrote about the encounter in a Facebook post, which Facebook user Jeff Lin translated into English on Sunday.

According to Lin's post, upon landing, the passenger declined help when a male ground staff member asked if the passenger required assistance in the toilet.

In her speech, Kuo said that EVA Air had failed to protect her as an employee and that a crew member was questioned on why a photo of the passenger was leaked online.

Taoyuan Flight Attendants Union has urged EVA Air to change its policies and establish that passengers who need physical assistance must be accompanied by their caretakers and that employees should be able to turn down unreasonable demands made by passengers.

Kuo also said during the press conference that this wasn't the first time the passenger had made such demands when flying with the airline.

Investigations will be conducted

According to a Facebook post by Taoyuan Flight Attendants Union yesterday, the same man had defecated in his underwear onboard an EVA Air flight in May 2018.

EVA Air issued a statement Monday on Chinese social-networking platform Weibo saying that it values the safety and well-being of its employees. It clarified that crew members are allowed to decline passenger demands they deem inappropriate, such as toilet assistance, feeding, and medical services.

It added that investigations would be conducted and appropriate measures would be taken.