https://journals.sagepub.com/doi/pdf/10.1177/26318318221116354
There's a weird sub-culture which believes that erectile dysfunction (ED) is linked to pornography. As is likely no surprise to anyone, this study shows it isn't. The only variable which is here is anxiety.

https://www.statology.org/moderating-variable/ If you don't understand what she means by "moderates", this resource might help you.