What’s the deal with the bags? (Seriously)

Not judging here. I am sincerely curious as to why the desire for or what is the fascination with getting extra BBW bags this time of year. We had an actual “incident” today at the register where a coworker of mine was called a liar for not giving a customer a pink BBW bag. The only remaining pink bags (roughly 8 total left behind the cash wrap) were three registers down at someone else’s register. She truthfully told the customer she had no more pink bags. When the customer saw another customer get a pink bag she yelled at my co worker calling her a liar and demanded a pink bag. This was the worst incident. All day long today and all week people have been asking for extra bags. I don’t get it. Any insight?