People have to eat.
Even if they don't want to, don't feel like it, etc, eating is essential to health and life. You know you'd feel better if you engaged in a little loving, but it's difficult to tap into desire. But there are thousands of years of anecdotal evidence. Pine nuts, a frequent ingredient to pesto sauce, is often named as an inspiration to love as well. Spices such as cardomom, cloves, ginger, fennel and nutmeg, often used in Indian cuisine, are also said to aid in the act of love.