The act of sitting close to a person, side-by-side, but facing
opposite directions, and interlocking one arm each
to form a pretzel.
could be considered a prequel
to cuddling, since
resting your head on their shoulder, nuzzling, and tracing your fingers over their arm, etc. is acceptable, and expected.
On the base system
it would be before
first base; and on the snogging scale
it would be an approximate