My girlfriend (26F) has never been able to achieve orgasm. I (28M) have had around 20 partners. I've never been in a long-term relationship with a girl that I can't make orgasm. She's not interested in toys and doesn't care for oral. I had an ex that nicknamed me "Magic Fingers" for obvious reasons. Other partners have said similar things, but my girlfriend doesn'tenjoy fingering except for arousal. For the life of me, I can't bring her to orgasm. Penetration is the only thing that gets her close. I'm above average in size (I don't know if this helps or hurts). I have tried everything that I know to do to focus on her pleasure.
Everything else in our relationship is great. We've been together for 7 months.
Any advice?