Totally agree with you. At least in humans, there are two *very clearly defined*...

sliverstorm on Feb 13, 2014 | parent | context | favorite | on: Male, female or custom? Facebook adds options for ...

Totally agree with you. At least in humans, there are two very clearly defined reproductive roles. Test tubes and surgical procedures can interfere a bit, but you can't be "mostly" a gamete donor or "only somewhat" of a gamete receptor.