Female led relationships discussion

weve been practicing orgasm denial for some time now, but when we actually have intercourse it tends to end up happening faster than she prefers; she’d like us to focus on stamina training. She requested I create a discussion thread here to gather suggestions. By the way, we don’t wear a chastity cage

I have been locked away permanently for nearly four years now. My stamina is pretty much gone; I almost cum when she takes off my cage, which happens very rarely. When she does let me penetrate her, we use Dr.Numb numbing cream along with condoms (so she doesn't get numb). The result is that I can’t feel anything and last a long time. We only stop because I become exhausted or she starts to hurt. I really suggest this product.