There's a lot confusion about asexuals masturbating. Many asexuals talk about "cleaning out the pipes" and some even use pornography.
Hopefully this survey can help us measure what kind of masturbatory habits asexuals have..
The nature of the polling system makes some of the questions longer than they should be, but this should allow us to see all of the relevant data.
Also, if you masturbate using other means, and you're comfortable talking about it, it might be interesting to share.