Why redheads make Argentinians touch their left testicle

Just like many cultures ‘touch wood’ for luck Argentinians and Italians touch their left testicle (women touch their left boob).

In Argentina redheads are seen as very bad luck and if one is seen in the street people will often touch their left ball or boob to counter the evil spell. Burger King developed a whole ad-campaign around the subject.

https://www.thedrum.com/news/2018/10/10/burger-king-argentina-giving-bad-luck-redheads-break

http://italyinbirstonas.blogspot.com/2012/11/superstitions.html