The reason you're not getting many replies is because a) it's the weekend and b) it's a difficult question to answer.
I don't think there's a one size fits all approach here. But it's a good sign that he brought it up again. She should go back to him and say, "I've been thinking about your question and we should discuss it; this is something that I'd like to try or at least discuss further."
This should get them talking for starters. Once they talk a little and figure out what their specific questions are, then they can come here and ask them.
~SS