Scientific research published in the highly-respected Journal of the Organisation for Neurological Anthropolgy and Natural Trends in Interactional Cybernetics (ONANTIC), note a decline in right handed masturbation.

The research gives the reason for this change, matches, and therefore may be directly caused by, the shift in commonly used sources of masturbatory stimuli from paper-based (magazines as Playboy and Penthouse) to directly online-accessed or downloaded images. The effect of this, the researchers say, is that, whereas in earlier decades the left hand was sufficiently nimble-fingered to turn the pages of a magazine, more recently the right hand has in most cases become entirely occupied with manipulating the (usually by default right-hand-oriented) computer mouse. The result of this is that the left is then required to manipulate the organ.

a href="http://valuesaustralia.com/blog/right-handed-masturbation-decline/">decline in self abuse