erection

So i have been with my Girlfriend a few months and she's my first steady girlfriend. sometimes I will crash at her house and we will have sex in the morning. I've been noticing when we do it in the morning sometimes I go soft. from what I read online it's pretty normal but is there a supplement...

Why is my heart health tied so closely to my ability to get an erection? can anyone explain this to me also which supplements can help me get through this both benefit my heart and help me getting erection at the same time