Interesting article, and I would also like to add that entrepreneurs will often live with stress and pressure, and this has often made their marriages suffer. And if your marriage suffer, then so will your working morale... as a result, sex is something that will help your marriage, your relationship, and thus this comes as yet another positive effect!

Ps: Sex with someone who is not your partner might have some of the positive effects as well, but if you have to suffer from bad conscience and more, then those negative effects might actually remove the benefits you mentioned here!