Try taking arginine for a week if you want to experience the effect first hand.
It’s really a mixed bag.
Recall that Sildenafil (aka brand name Viagra) was originally developed to treat high blood pressure. Turns out that while it does lower blood pressure, it’s really good for improving erections.
I don't know about bad sleep, but definitely bad sex. ED is an early indicator of hypertension.
Correlation has no causation direction so you are absolutely right.
What I meant is that ED can be caused by hypertension, so if you get ED you should start checking your blood pressure. AFAIK chronic bad sleep doesn’t CAUSE high blood pressure in the same way. Not sleeping well will elevate your blood pressure, but not make it chronically worse. Put differently, if you have trouble sleeping at night, that doesn’t mean you have elevated risk of high blood pressure when rested.
But yeah, if you have high blood pressure (as I do), getting good sleep makes a huge difference in your numbers.
I never knew high blood pressure correlates with bad sleep or bad sex (if anything, meds for high blood pressure come with negative effects on that).