Sex and Romance. Blood and Wine Romance.  Hearts of Stone Romance.  Keira Metz.  Triss Merigold.  Yennefer.  Brothels.  Jutta An Dimun.  Madame Sasha.
While that doesn't translate to 16 hours of actual sex scenes in the game, The Witcher 3 still gives the player plenty of chances to get it on with
The Witcher 3: Wild Hunt sex scenes guide shows everything we know about sex and romance in the game - importance for story, realism, depth.
[Spoiler Free] The Witcher 3 Wild Hunt Friends with Benefits part 1 trophy. This is the third side quest with Keira Metz called Favor for a Friend.