Physique indicative of penis size

So I’m sure a lot of you know that being overweight can have some implications on penis size due to fat pads or even just not having enough blood flow to the target area.

In the same way that it is easier for a mesomorph to gain muscle than a skinny person, can your body type affect your penis size and gains?

For example I’m quite skinny at the moment so to help gains would more cardio and putting on a bit of muscle help penis size?
Lastly, I’ve just purchased some ‘Whey protein’ (those massive tubs of powder to mix in drinks), I originally got this for muscle building but would this also help penis size?

Thank you for any help and I hope the answers to these questions can help other in my position too :)

No.

Cardio can indirectly help in some ways but it does not provide actual growth. For example, I like to do my stretching routines after a cardio workout and that is because high intensity workouts causes the bloodflow in the body to be spread out in every other area and removes as much blood from the penis as possible which allows for easier and more effective stretching.

The penis is not a muscle, so no.

No.

No. Although cardio may help with getting the best possible erection.

Yes, firegoat is correct about fitness possibly improving erection quality.

No. You have everything thing you need to build a bigger unit. More muscle, or protein supplements won’t help.

All that protein might help with cum though.