Notice how this Passuk of Tzitzis comes right before many Halachos pertaining to Arayos. It appears like a heading to Arayos: “Be careful with Tzitzis and respect your “clothes” (i.e. your Tz'niyus) and don’t get involved in those various Inyanei Arayos”. First the Torah mentions the “positive” side, and the “precaution” against Z'nus. “An ounce of prevention is worth a pound of cure.”
By the wife of Potiphar, it says: she grabbed Yosef by his Beged. Besides the simple Pshat, we can suggest this is a Remez that she grabbed his Kavod and his dignity which a Beged symbolizes (Gemara), since she was trying to get him to be Nichshal in Z'nus, which is a shameful and humiliating sin.
And Chazal say that for Yosef’s self-control, he was rewarded with all kinds of royal clothes. Since he had no improper thoughts in his head, therefore he’ll wear a crown on his head, and for every limb that he didn’t use improperly, he was rewarded with a royal Beged to be worn on that limb.
Clothing is very important to us Yidden, and when Dovid was M'vazeh: clothing (when he ripped Shaul’s Beged) he was punished that in the end of his life: clothing couldn’t warm him. A lot of clothing means lots of dignity, therefore the Cohen Gadol wore 8 Bigdei Kehuna.
Golyas the giant was the result of lots of Z'nus of his mother Orpah (Gemara) and the Meforshim say that Dovid compared him to animals (lions and bears). The difference between a human and an animal is clothes. A Tzelem Elokim is Chashuv, and his wearing clothes is a mark of dignity. The more people degrade themselves (especially with Z'nus, which is animalistic) the more they become like animals.
That’s why the first antisemitic Nazi law was anti Shechita; their perverted love for animals was a sign that they are indeed closer to animals than to people. When you see Yidden with Tzitzis, remind yourself about the true Tzelem Elokim that they are.
Humans wear clothes to separate & guard & “protect” from each other. We aren’t Hefker like animals.
