He knows he's guesting on a late-night talk show that can get raunchy really quick if it wants to.

But it appears there are just some things you can't make Ryan Bang do. Like mention the word sex, for example.

On Friday's "Tonight With Boy Abunda," the comedian-actor shared that a clip from his last appearance — wherein he was asked to pick between sex or kimchi — went viral in his home country.

His dad, who lives in South Korea, even got to watch it and teased him that he should have picked sex over the dish.

Bang tried to avoid mentioning the word sex this time around by spelling it out rather than saying it.

He also refused to answer some "Fast Talk" questions that involved the word, but laughingly admitted to not being good in bed, preferring to have the lights turned off, and that the best time to do it was right after his interview.

It's all fun and giggles, but Bang explained that openly talking about sex on TV is still very much frowned upon in his country.

On Friday, Bang was announced as the new ambassador of South Korea's Gangwon province. He said he is grateful for the opportunity to promote his hometown to Filipinos.

Bang made an appearance on "Tonight With Boy Abunda" to help promote his movie with Maymay Entrata and Edward Barber, "Loving in Tandem."