How important is it to keep it "straight"?

When I hang, my penis rotates a little either to the left or right and my hanger usually tilts a bit so the left or right part is higher/lower than the other. Is this going to cause me an erectile dysfunction in the long term or is it safe?

A bit of rotation is inevitable when hanging, I think. Don’t worry about it too much. Pay attention to your penis’s sensitivity and your erection quality; those are your guides to whether you’re causing any problems.

This used to happen to me all the time because I used objects with irregular shape as weight (various sized bottles filled with water and sometimes steel ball attached to them). It didn’t feel right to me, as if there’s more tension on one side of ligaments than the other so I used my legs to somehow prevent weight from rotating to either side. This was done while hanging straight down. If I were hanging BTC, I wouldn’t know how to prevent it.

I don’t think it matters. Some of us do bundled stretches where we twist our cocks around 360 degrees (or more) and pull, and some of us can still get it up.

Thanks a lot for your replies!