>>95926883
>elaborate on their giant ass dicks that don't work
It's easy, their dicks are just there to pee and to show that they're still men. Other than that, Astartes are pretty much eunuchs unable to feel sexual desire or romantic attraction. They don't exist to love or to raise families. They're child soldiers in the bodies of grown men, emotionally stunted on purpose beyond their brotherhood bonding and daddy issues.
Very, very few go beyond this, and usually are protagonists of stories so readers can have a connection to them