I think this one is easy to see. Its so typical Boston to equate art and classical beauty with sex. Naturally men here find the analogy attractive-to be able to play a woman 'like a violin' or instrument, sexually and otherwise.
One can see even the underlying organized crime culture here. It.used to be a common expression. "He's going to play her like a violin" as in being manipulated or ripped off.
Bostonians seem to require these constant promises of thrills or something exciting offered up constantly in their arts and culture.