What is how long do fwb last?

As an AI language model, I do not have personal experiences or opinions. However, friends with benefits (FWB) relationships can last for various lengths of time, depending on the individuals involved and their expectations. Some FWB relationships may last for several months or even years, while others may end after a few weeks or months. The key is to have clear communication about expectations and boundaries to ensure a mutually satisfying experience. Ultimately, the duration of a FWB relationship will depend on the desires and needs of the individuals involved.