According to The Guardian, The Witcher 3: Wild Hunt includes about 16 hours of mo-capped data for the game's sex scenes. So, why so much? CD Projekt RED explains the need to PC Gamer.
"We are establishing that your character was intimate with this woman recently in order to plant in your mind, that, at the very least, he must enjoy her company," Senior Game Designer Damien Monhier said. "Through sex we have shown that this is a person who Geralt would be compelled to chase after if she went missing."

Monhier noted that sex is the fastest way to establish these kinds of meaningful relationships and attempts to justify Geralt's pursuit of Yennefer.
"We couldn't just tell you to go find someone you don't know or care about," he said. "It wouldn't work."

Now, just because there are 16 hours of mo-capped data recorded that does not mean there are actually 16 hours of in-game sex scenes.

The Witcher 3 is slated to be released on May 19.

(via PC Gamer)