It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that Sayyiduna Umar (may Allah be pleased with him) said: What is the matter with people, they have intercourse with their slave women, then separate from them. From now on, if any slave woman comes to me and her master admits to having intercourse with her, I will join the child to the master. You have the choice, whether you practice coitus interruptus or not.