Early generations of short wave radios had large flat tuning dials requiring spreading all five fingers and placing them on the circumference of the
dial in order to gently
turn the dial right or left to tune in a distant location (
Rangoon). Spatially, the gesture resembles that of palming a woman's ample breast.
Two guys are sitting in a bar, in walks a woman with
large breasts, one guy turns to the other,
winks and says 'Come in
Rangoon.'