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In my case, I was an older brother to three younger sisters, but Becky and me were the primary sibling rivals (when dad remarried I was 21, Becky 17 & Maria only 6; when Beth was born I was 23 & Becky 19)
As I alluded on another thread, Becky began getting a weekly manicure & pedicure when she was 16 (and occasionally recieved them in summertime even at 14). Since a barber shop was located in the same shopping center, I'd often offer to drive Becky to the nail salon. Of course, older brothers often have ulterior motives, especially if Becky had gotten me in trouble with dad

Becky has always been extremely ticklish...especially on her bare feet (which makes me wonder why she gets pedicures so often??). There'd always be a longer wait at the salon on Saturday morning (especially at prom time), so I'd always get back from my haircut before Becky's pedicure. Pedicures, especially back in those days were torture for Becky...she'd sit there bravely biting her lip, trying her best not to laugh.
I'd sit there casually, reading a magazine or paper, and as the technician began removing dead skin with the pumice stone, I'd look over at sis...and say "gee Becky, I sure bet that tickles" or "cootchie koo" (while wiggling my fingers at her)...which would of course, always prompted sis to burst out laughing. I'd promise to be nice and not do it again, but I didn't have to...she'd spend the remainder of the pedicure giggling without me ever saying a word

I also loved to torment Becky by "pretending to read her diary. I was enough of a gentleman to not read it, but loved to make her think I did. Move it around, or turn it over....make her think I'd read it. It drove her crazy

Sis paid me back by staying awake until after curfew just to catch me coming in late (I had a 1 a.m. curfew even at 20, unless I was working late...because I still lived under my dad's roof) and yelling as loud as she could "Dad!...Perry's FINALLY home"!!

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PW