By that logic, all love is essentially selfish, because we love so we can live and leave a legacy.

FORBES: What We Humans Value: The Indulgence of Being Loved

Another reason to stop destroying our environment with human toxins like CO2 is less selfish: for a Love of Nature.

FORBES: Why Alternative Energy

But what I love about television, I guess I have to be selfish, are the hours the most.

NPR: Acting Students Ready for Their Next Role

The reason is that it makes us more selfish, more introverted and less able to open your heart in love to other people.

BBC: Is it even possible to live a celibate life?