you could just suggest to her that she experiment with tasting herself via fingers or whatever when she masturbates.
(assuming she does..)
that way may be less intimidating for her?
and if she's real concerned with whatever, tell her to ask her gyno about it (if there really are any off smells/tastes or whatever)
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Therell be days/When Ill stray/I may appear to be/Constantly out of reach/I give in to sin/Because I like to practise what I preach