What are the underlying processes occurring during an orgasm that are the biological causes of the pleasurable sensation we associate with it? Is the sensation of orgasm a function of the nervous system, or is it something neurochemical in the brain, or both, or neither? Is the reason that certain masturbatory and/or sexual acts feel good because of nerve concentration in the erogenous areas, or is it something different or more in nature? [more inside]
posted by WCityMike on Sep 2, 2008 - 9 answers

Can anyone help me find the pictures I once saw of remapped nervous system density in rats and humans? [more inside]
posted by rebirtha on Feb 2, 2006 - 6 answers

When I'm lying in bed sometimes I can concentrate and send what feels like a charge of electricity down my spine. Am I actually doing anything or is this entirely mental? My back will physically move a bit as I do it and it feels quite nice, but is it just some sort of illusion?
posted by jheiz on Feb 8, 2005 - 26 answers