Backstory: GF and I had sorta established that her ass was off-limits, but during a really passionate bout of oral sex on her, she moved my head down to the previously-agreed upon "forbidden zone". She told me afterwards that she really enjoyed it (as did I), and never had experienced it before. A few questions: 1) She's really shy talking about anything sexual (and I'm not, really), so I'm curious on how to approach it again. I can totally see her just avoiding the whole issue because it embarrasses her. 2) Any tips on the actual activity from people who are more experienced? Thanks for the help.