And that means they can stack on top of one another very well. And by stacking very well, we have a very small distance between the molecules. And if the distance is smaller, the intermolecular bonds are stronger. But in the mixture that contains these CIS double bonds, the stacking isn't very well. So one molecule is positioned this way, the other one is this way. And so we have much less of the intermolecular interaction taking place in the case where we have those double bonds.