No, they're not worried about joggling your junk. It's because you need something like an extra half inch in the seam on the side you dress on to leave a little extra room in your pants for your dick. Well-tailored pants are asymetrical. Not sure those of you who wear briefs need to worry about it.
This seems like a good place for a joke about hanging dong. Podcasts about how the distinguished gentleman may properly hang dong in tailored slacks, let's go with that
This is the right answer. It's so if you're wearing tightly tailored pants you have some dick space so you're not imprinting and showing it off to everyone.
I don't have the equipment to know if this is true or not, but it seems smart to ask the person you're fitting so that you don't accidentally grope them
Its true. This is a common tailoring question for men. Nothing to do with being fondled and everything to do with the pants fit. If you are getting measured like this for expensive pants your going to get nudged a bit anyways when they do the inseam measure.
I think you're telling me you're a woman. I want to point out that seeing a tailor is a non-sexual experience. I'm not sure I've ever been to one, not even a female tailor, who HASN'T made incidental contact with my genitals when checking fit, particularly in-seam. It's a far cry from being "groped". It's a bit like imagining a lingerie specialist worries about touching someone's boobs, or that a doctor gets worried about seeing someone naked.