Everyone wants their fantasies to be fulfilled, or at least entertained by their partner. So you better be open to your partners wants and needs.
All relationships are about sex to some extent. But to apply that aspect to only polyamory is simply faulty logic.
From my friends over at Va Va Voom here is a graphical history of the condom. Through years of misinformation from those pursuing personal religious agendas the condom is still here and getting better every year.
The only unnatural sexual act between consenting adults is that which their bodies cannot perform. So don’t let anyone tell you that you are sick and perverted because your sexual fantasies and turn-ons don’t match theirs.
I thought about this. In my experience I’ve always got more sex from my partner when they are fucking other people, whether they were cheating or in an open-relationship.