I mean, think about it... even as you walk this area is under constant friction. (annmariegianni.com)
Diapers that are too tight are irritating but diapers that are too loose can be just as bad since that allows for constant friction in an active toddler, contributing to chafing. (verywellfamily.com)
Dr. Grind's child psychologist parents raised him using the «Constant Friction Method,» a system they devised to inure him to the unpredictability of the world. (bookbrowse.com)