"This is the perfect example of true love, and this fact makes me believe that animals have stronger bonds than we humans. Searching for the perfect thing to gift it to your love is quite an amazing way of valuing the relationships, particularly amongst animals."
"The searching of the perfect rock on the beaches may not seem so much relevant to build a nest, but some male penguins go far away in hunt of impeccable stones."
Article source: https://goo.gl/YAxjor
I find this very amazing as compared to we humans. The Penguins seems to put more effort into gifting and according to the article some Penguins even steal from other's nest when no one is around.