An is a practice focused on delaying climax to enhance pleasure, build stamina, and explore the limits of physical and mental sensation. While it can be practiced solo or with a partner, it has recently gained attention in online communities and social media as a "challenge" meant to test self-control and extend intimate experiences.

Excessive sessions can occasionally lead to temporary desensitization or soreness.

Some view it as a test of willpower and self-control, requiring intense focus to stay at the edge without slipping over. Common Misconceptions and Internet Slang