[smileysteve]

My point in emphasizing is that there are no known physiological addictive components of canabis.

Presumably, the op knows the same, hence specified mentally addictive, but is confused because they don't think peanuts have the same, but they do. Mentally addictive only means you like the way it makes you feel so you keep doing it, not that your receptors actually need it or stop functioning without it (chemical dependence)

Cannabinoids have similar addiction pathways (dopamine receptors) as sex, sugar, and, for this example, salt.