Binocular rivalry and orgasms
See this paper:
J.D. Pettigrew (2005. Laughter abolishes binocular rivalry. Clinical and Experimental Optometry, 88 , 39:45.
You have to read to the end to find this gem:
"The results presented here are supported by informal results showing that
both binocular rivalry and the interhemi-spheric nasal cycle are also interrupted by
the laughter-like sudden shift in motivation associated with orgasm (JD Pettigrew,