[@ClocktowerEchos]

I am such a nerd )=

Space Marines don't have any sexual hormones, as all production is removed during the process of becoming space marines. A space marine cannot have children and feels no attraction to members of either sex. In fact it's implied in some sources they don't even have genitalia. This is a process performed to ensure that a Space Marine is never distracted from his duty by questions of love, lust, or the risk-taking impulsiveness often caused by testosterone.

Feel free to ignore the obscure canoooooooooooooooooooooooooooooooooooon~~~~