Why do bodybuilders all seem to be rather small between the leg?

I don’t date men, so I’ll likely never see a male bodybuilder naked in person, hence asking - why do they all seem to have small penises? Are they actually small or does it just look that way when they’re on stage? Did they start out that way or is it because of their usage (I’m assuming they’re on roids)? If they stopped gear, do they grow again down there? Do the balls get smaller too or just the penis if they’re on roids? Is it only roids that make it get smaller (if it does) or just all the things you need to do for bodybuilding in general (if they’re natural)?

Thanks for answering!