Cardio---blood flow.

I heard it’s best to do cardio(30min+) in your weekly routine to enhance blood flow. Is it better to do cardio before or after PE?

Before in my opinion. This is what I always have done and it worked great this way.

Same here. I reckon the relaxed state after a cardioworkout reflects on PE too. But then I have to admit I just began with PEing so my opinion may not weigh too much.
So far I like to PE also after weight training. Who knows, perhabs the hormonal reaction after a workout helps with PE too.

Rock hard

Pfund