It's no secret that men and women are very different. Research has shown some major differences between the male and female brain. The chemistry, processing, and physical sizes vary and sometimes quite drastically.
I wanted the illustration to have a non-gender specific colour palette so I avoided strong reds, pinks, blues, and cyan. Originally, I wanted the opposite where the illustration had blues on one side, reds on the other and in the middle where they meet would bleed into a purple. Opted to step away from that approach as I felt it looked a bit too aggressive for the type of article this was based on.