When you donât wipe very well after number 2 and you leave residue behind. When spreading your cheeks it releases the sound that of Velcro due to the pasted poop around your anus.
Guy 1: hey dude check this out
spreads ass cheeks
Guy 2: woah that totally sounded like Velcro butt!!!
Guy 1: ugh no way I thought I wiped this time!!!
Guy 2: better get a boudet bruh.