I abstained from masturbation from July to December, but I can't say that it had a noticeable effect. From mid July to the end of August strictly nothing happened, from then on I had recurring wet dreams (frequency ranging from 4 days to one month), precisely 11 wet dreams between the 25th of August to the 16th of November. Shortly after I stopped cataloguing because I was sufficiently convinced they had no major impact on my state of mind.

What I did discover was how my diet affected the occurrence of those wet dreams, which I hypothesise are exacerbated by elevated blood sugar levels (especially before going to bed). There would need to be proper tests run to make anything of that though.

My point is, though, it's not so easy to decide or not to masturbate -- your body also has a say in it (for better or worse).