It's easy. You draw a red line on the ground, right? Then you wait for a chicken to come along. When he arrives, he puts his beak right on the line and he's hypnotized!
The difference between romantic love and friendship love is that romantic love involves a lot of compromise. It is a very giving type of love. With friendship, you can be a little bit more autonomous. You are not expected to compromise, in the same way. Maybe that's why friendships tend to last longer.