I’ve been with my girlfriend for about 6 months now and I can’t seem to make her cum through oral anymore. She only seems to cum when using a vibrator and me simultaneously fingering her or via penetration.

When I eat her out, I end up going down on her for about half an hour to an hour without her cumming. My jaw, neck, and arms start to go numb and give out before she cums.

This is really discouraging because I used to be able to make her cum via oral in the beginning and now I can’t at all. She’s told me she feels bad about not being able to cum so I’m sure that doesn’t help either. She also says that it feels really good the entire time and that she comes close to cumming a lot but can’t seem to.

Can anyone give some advice?