I thought lesbians masturbated more than straights?
Possibly true, and like I said there was no indication that she was sexually repressed before
My guess is that she just had never heard the English word for it before (Korean is her native language and she's mostly but not entirely fluent in English) so she was embarrassed about her lack of English skills, not masturbation.
I just tell the story because she is the only person I have ever been even the tiniest bit unsure masturbated
She probably hasn't, since she's a she, and women don't do that.