Sequoyah Reynoso is a high school biology, chemistry, neuroscience and psychology teacher in Massachusetts. He previously studied cell-surface molecules on sperm cells in the lab of Pascal Gagneux and earned a PhD in 2018. While winning a mate is an important step in sexual selection, there are additional biological obstacles to hurdle in order to successfully procreate. For instance, compatibility between male and female gametes is vital for successful fertilization and survival of the embryo. He wonders whether such hidden biological (in)compatibilities somehow manifest themselves via surface attraction between two individuals, and what neural mechanisms exist to mediate the selection of a suitable mate.