“What’s the difference between a violist and a dressmaker?” (joke)

A popular dirty joke told by many musicians is:
 
Q: What’s the difference between a violist and a dressmaker?
A: A dressmaker tucks up frills.
 
The joke has been cited in print since at least 1992.
 
       
Google Groups: rec.music.classical
Musical jokes
“Vinay K. Chaudhri”
7/31/92
(...)
What’s the difference between a violist and a dressmaker?
A dressmaker tucks up frills.
 
Google Groups: rec.music.classical
Musician jokes v2.0
boB
9/1/94
(...)
Q: What’s the difference between an alto and a dressmaker?  A: The dressmaker tucks up the frills.
 
Google Books
The Everyday Almanac:
A Copious Compendium of Facts, Figures, and Fun
By Bob Perlongo
Santa Barbara, CA: Capra Press
1995  
Pg. 317:
Q: What’s the difference between a violist and a dressmaker?
A: A dressmaker tucks up frills.
 
Google Groups: bit.listserv.bgrass-l
FW: Viola Jokes
Pollak, Edward
7/13/95
(...)
What’s the difference between a seamstress and a violist?
The seamstress tucks up the frills.
 
Google Books
Musician
Issues 236-241
1998
Pg. 298:
What’s the difference between a heavy metal guitarist and a dressmaker?
The dressmaker tucks up the frills.
   
Google Groups: alt.usage.english
Tongue twisters
R H Draney
5/28/01
(...)
Introducing the viola joke as another genre, there’s:
 
Q: What’s the difference between a violist and a seamstress?
A: A seamstress tucks up the frills.
 
Google Books
The Musician’s Joke Book
By Jim Green
London: Omnibus Press
2010
Pg. ?:
Q: What’s the difference between a flautist and a seamstress?
A: A seamstress tucks up frills.
 
Twitter
Elva Gilmer
‏@ElvaGilmer
Q: What’s the difference between a violist and a dressmaker? A: A dressmaker tucks up frills.
11:47 AM - 5 Mar 2015