Its not just a simple push, its a push over a particular time, When your piston is at perfect top dead center or at perfect bottom center, no amount of pushing move the piston. (mechanics.stackexchange.com)
Instead of throwing money away with each diaper change, cloth diapers are reusable and the best chemical free option for your baby's perfect bottom. (nickisdiapers.com)
We've been trying to come up with the perfect bottom balm and we are pretty happy with... (gobabygoshop.com)