User blog comment:EliteHawks123/Space Marines(not the game..)/@comment-2253300-20110812042936

1. I am pretty sure they have private parts. 2. I am not sure on the relationships bit. There is certainly a lot of fluff that states that Space Marines live only to fight, but there are also references of people who are descendants of Space Marines like Uriel Ventris. 3. They can not, at least not without becoming a rogue. Space Marine Doctrine is very clear on fraternization with Xenos. If you become friends with a Xeno then you are meat. However there are exceptions to this rule.