Masturbation and revision

Title is indicative of what I'm going to ask. Does masturbation negatively impact your ability to revise?

I ask because I am currently doing my Legal Practice Course, it is a course that enables me to become a solicitor. Due to the benefits of completing this course doing well is of paramount importance. I am not someone that masturbates often, perhaps once a week twice at the absolute most. However I do find that on the days I masturbate I am not as focused or driven to revise, but this is comparable to how I feel on other days when I may have abstained from masturbation. Is this purely coincidental? Or is PMO the root cause?

Thanks in advance, personal experiences/evidence used to back up points would be much appreciated.