Yahya related to me from Malik from Humayd ibn Qays al-Makki that
a man called Dhafif said that Ibn Abbas was asked about coitus
interruptus. He called a slave-girl of his and said, "Tell them." She
was embarrassed. He said, "It is alright, and I do it myself."
Malik said, "A man does not practise coitus interruptus with a
free woman unless she gives her permission. There is no harm in
practising coitus interruptus with a slave-girl without her
permission. Someone who has someone else's slave-girl as a wife, does
not practise coitus interruptus with her unless her people give him
permission."