BUR #56745 has been approved by @nonamethanks.
create alias arm_around_back -> arm_around_another's_back
create alias arm_behind_another's_back -> arm_around_another's_back
create alias arms_around_back -> arms_around_another's_back
create alias arms_behind_another's_back -> arms_around_another's_back
Not to be confused with arm behind back and arms behind back. Also I don't know if these should imply or be implied by arm around waist / arms around waist (forum #425349). Opened topic #35430 for implications.
Updated by nonamethanks