[abtsvomo] Tango curriculum for lovers

Consider an Argentine Tango curriculum based on volcada and gancho as the fundamental concepts, in contrast to how they are typically taught as advanced moves.

The idea is that tango is at its core a social dance for people who like to touch each other, so who like to press against each other and who like to wrap their legs around each other.  Silly tricks like walking can come later as advanced moves.