Similar to capillary action, this is the process that allows the brown liquid from a baby's full pant load to creep up the narrow gap between their diaper and back rolls. This can happen without a gravity assist - often the crap juice will travel in ways that seem to defy conventional physics.
As I put my hand behind baby to get him/her/it out of the crib, I got a handful of soggy onesie. CRAPILLARY ACTION!!!
by SICST9 January 24, 2018