Take it from Groupon: When a product you're selling resembles a sex toy, your best bet is to play innocent.

After posting a link on Facebook to a product called the "Banana Bunker," Groupon was swarmed with commenters making sex jokes about the item's resemblance to, well, you know what.

The deal-of-the-day website, which is known for having a sense of humor in marketing, began replying to every one of those comments, making witty and coy jokes that danced around the Banana Bunker's appearance.

Groupon responds to Banana Bunker

The stunt worked out for everyone involved, as customers got a good laugh, and Groupon actually sold out of the product.

Turns out penis jokes are a real catalyst for sales.