Sex in the 18th century: from Daniel Defoe,

We had not sat long but he got up and, stopping my very breath with kisses, threw me upon the bed again; but then he went further with me than decency permits me to mention, nor had it been in my power to have denied him at that moment...

However, though he took these freedoms with me, it did not go to that which they call the last favour, which, to do him justice, he did not attempt; and he made that self-denial of his a plea for all his freedoms with me upon other occasions after this. When this was over he stayed but a little while, but he put almost a handful of gold in my hand and left me a thousand protestations of his passion for me and of his loving me above all the women in the world.

Last favour? What in the world is it talking about? Intercourse? Oral sex?