Ok I get it now. Bighands... not saying there is anything special about my erections...like Koko...erections haven't been quite the same since the teenage years but if it's hard enough to achieve penetration then it's probably just as effective as the old cat couldn't scratch it erection Guys hit sexual peak around 17...women hit it around mid thirties. Just the way it goes I think but I will check out those exercises.
If she is on an AD that makes orgasm difficult to impossible then I'm not sure there is much point in the erection enhancement thing but kudos for trying. I hope she appreciates it but she is probably also frustrated and I'm sure she doesn't blame you. She has no reason to. Sounds like you are doing all anyone could do. You might want to get some input from female members on AD's that impair the ability to orgasm.
I'm a single guy with agoraphobia so other than the old rattlesnake shake there is nothing to judge stamina.
I'm sure you know there are different types of female orgasm but it sounds like you are covering all the bases. Again...kudos to you for caring this much.