I just realized, scientifically, the only possible way to colonize space would be to have space ships with an all female crew who would become the male Captain's harem.

It would be the only logical way to colonize space. You need as many fertile females as possible. You only need one sperm donor. Each ship would have the best possible male specimen. The ships would trade babies to maintain genetic diversity to prevent inbreeding.

This is the only way, because Science!