I apologize if my english is not on point. Not from a english speaking countrie.
Behavioral: Dont think there is one. But if there is not seeing what it might be.
Psychological: Not an issue. Couples night/date night ect happens. The oxytocin aspect all good. Sex is on the menu and not infrequently. She is all in for that. No hating you with my vagina so hurry up is going on. The only thing missing is the libido/craving for the act.
Physical: Must be.
Often difficulty to orgasm.
Day 15 and 16 of menstruation (ovulation), boom and its on. Pretty much every other month its there but nothing spectacular and every other month the sex drive comes with vengeance.
Her second trimester of pregnancy was also a awesome hormonal cocktail, we both thought. Im a 3times a day guy if I would have it my way and she wore me out.
Just by that we know its in there locked up, and both want it unleashed. Because why accept doing it for the reasons you mentioned, when you already know how it is the other way.
Current health you can read here above.
This must be a chemical imbalance of some kind. So the only thing to do is to experiment carefully.
Of all the chemicals available out the. What would be the most female friendly, increases sex drive and has low side effects.
Also if you guys suggest any thing you have tride that worked. What was it, any side effects, dosage size and you hight and weight (she is very petite so her dosage would probably be smaller)