Physical factors include natural hair type and growth patterns, face and head shape from various angles, and overall body proportions; medical considerations may also apply. Self-image may be directed toward conforming to mainstream values (military-style crew cuts or current "fad" hairstyles such as the Dido flip), identifying with distinctively groomed subgroups (e.g., punk hair), or obeying religious dictates (e.g., Orthodox Jewish have payot, Rastafari have Dreadlocks, North India jatas, or the Sikh practice of Kesh), though this is highly contextual and a "mainstream" look in one setting may be limited to a "subgroup" in another.