Christian modesty is a good book to read on this subject. As a previous poster read, a key passage is Peter putting his outergarment on because he only had his inner garment at the time. He did this because men are to cover themselves. It's hard for me to where short sleeve shirts in public because of this command. I believe that the man's arm is to women, what the legs are to men.

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Frank
member/Reformed Baptist Church, NJ
1689 BCF
Technician in NewYork
Titus 2:13
...looking for the blessed hope and the appearing of the glory of our great God and Savior, Christ Jesus...