How would you react?
The humans created that way would be sexless. However if they changed the parther, their body would change to the need.
So with a male --) into female and female into male.
In other words. The sexless human would grow a bodyparts needed for a production of a offspring and once this is done, they would turn back to normal.
Similar like asexual animals---just a bit diferent. (it needs a parther of other type) http://en.wikipedia.org/wiki/Asexual_reproduction
It would look like a human with no male/female parts.