You finish too fast. Before she is even properly warmed up, you are already done. The awkward silence after is the worst feeling.
You start strong but go soft midway — right when things are getting good. You cannot understand why it keeps happening.
The desire is in your head but your body is not responding. That disconnect between what you want and what your body does is deeply frustrating.
Your energy crashes in the evening. By the time it matters most, you are too tired. She is still awake. You are not showing up.
You have noticed your woman is no longer as eager for you as she used to be. You know why. She has not said it yet — but you know.