Board Thread:Warhammer 40k General Discussion/@comment-20282318-20140210075721/@comment-108.20.14.7-20140211004758

They have never addressed it directlly. However The Emperor's Children, Black Legion, and other CSM do display sexual tendencies even after their becoming Astartes. Considering that nothing about the method of turning a man into an Astartes has changed since the Great Crusade I can say that they indeed are capable and may be interested in sexual activity, however the later does not seem to be the case for the standard loyalist. Slalamenders present an interesting exeption, they may not be alone at that. Are thy sterile? We can't say for sure. It defenatelly seems that they are to me though. They were made for war nor procreation.