Hard to say really.....I have never craved love in the abstract....actually I have never craved sex in the abstract either. We know the chemistry of nicotine craving and that, I think like alcohol and some drugs, crosses the line from craving to addiction. There is research that suggests that some people are more likely to become addicted both to substances that have a clear addictive chemistry, like nicotine, but who also seem more likely to become sugar addicted or food addicted, maybe even exercise addicted. I did try a meat and fish free diet once and it was okay but not massively enjoyable, also my digestion doesn’t cope well with many kinds of fruit and veg so it was a bit limited. Oddly, the only time in my life that I have experienced real cravings (I have never smoked) was when I did Atkins and I would seriously have killed for carbs....not oily fried stuff or sugary items but things like rice, bread and pasta. I am fairly dubious about any craving being the body saying “I need this"