Sex can be more than just the physical act. There are often feelings or misconceptions (good and bad) that can come up during the act, even if it is only being acted, and especially if it is going to be filmed in front of a crew of any size. An intimacy coordinator helps all parties involved (actors, directors, sound, lighting) feel comfortable and not work outside their own safe boundaries.

There has also historically been people who take advantage of others based on their perceived power in the film industry. An intimacy coordinator is there to stand up for the safety and rights of people on set when they are at their most vulnerable.