Penguins mate once and stay together for life. It's depressing to realize that penguins are kicking my ass in the relationship department.
Relationships for penguins are a much simpler and elemental matter -- propagation. Human relationships are much more complex and we often get into them for the wrong reasons. When we do that, those relationships are likely to fail. But, if we are smarter than penguins, we learn from our mistakes and do not repeat them.