This reminds me of something... true story.
I was buying a suit back in Chicago around 1987. I walked in to a local shop run by a charming Vietnamese family. Grandpa sat out front and smiled. Dad worked like a dog inside keeping the old store in good repair and clean plus doing books. Mom greeted you at the door, smiling and lovely and helped you find everything. Her daughter slaved on her books behind the counter under the watchful eyes of her parents.
I eventually picked out a modest gray with a faint pinstripe. Then grandma, who was maybe 55, came out of the back. She had a tape-measure over her shoulders and was going to measure me for the pants. She measured my waist, no problem. Then she reached into my pants up to her elbow and grabbed my crank. she flipped it from one side to the other saying, "Which way you dress? Left or right? Left? Right?" She kept on flipping my cock back and forth in my boxers like it was some eye exam. "You like Left? Or right?" I looked up at the mom - she just kept smiling at me. I looked at the daughter - at least she looked a bit embarrassed and popped a book over her face. Grandma just kept flipping me back and forth.
"Left." I finally stammered before I grew too much. Had she flipped me twice more I would have been dressing straight up.
I got 6 more suits from that place over the years. Grandma never forgot which side I dressed on. She never asked again. She just plunged her hand into my pants and made sure my cock was in the right spot before she measured my inseam.
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"Jelly-belly gigglin, dancin and a-wigglin, honey that's the way I am!" Janice the Muppet