Quote Originally Posted by gwahir View Post
Physically, the only surefire difference is that men have penises and women have vaginas.
Well actually there have been studies that have shown or suggested different neurological differences between men and women. For example males tend to outperform women in spatial ability tests (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2651884/) while the section of the brain that is responsible for language is larger in women (http://www.ncbi.nlm.nih.gov/pubmed/9041858) which could suggest that generally women are superior to men in language-based subjects.

However these finding shouldn't be used to exclude one gender or the other from performing certain tasks. There will always be some women who are better than some men at spatial reasoning just as there will always be some men who are better than some women at language-based subjects. People should be judged individually of their skills and assets but it's still important to realize (and celebrate) that women and men aren't exactly like each other neurologically.