Einar smells like THE WILD. Hints of melon, the ocean breeze, and to be honest dirt. His musk can sometimes mix badly with his sweat, but he would make sure to stay clean and smell fresh.
What they smell in their amortentia:
A strong smell that remind him of his little farm back home : cow, woodland some others, he can't really tell. There's a small hint of something that remind him of rose but he can't tell where he smelled that to have such impact on him.