I don't know how to ask this in a way that makes sense, but when me and gf (both 20) get intimate we usually tend to cuddle. No problem with that, cuddling is fun. When we cuddle she tends to get really touchy. We've been together for a couple months now and she has no problem with giving me hand jobs, and i get to play with her too. No complaints there.
But as soon as the oral sex comes she goes down on me for a few seconds and comes back up. I don't want her to stop but I don't want her to be forced into it. I never ask her to go down on me, she does it voluntarily when we cuddle and she won't let me go down on her either the one time I tried. I've never had a BJ last longer than 15 seconds with her. After that we make out some more, touch each other some more, then after another 30 minutes or so she will go down on me for 10 seconds.
It's not frustrating, it's just confusing, it makes me wonder if she wants to do that at all. We haven't had sex with each other yet, but we both have with previous relationships. That confuses me even more.