Start with the foot
fully everted (sole turned outwards) and the band just taught so that resistance is felt throughout the whole movement.
The Eastern Tiger Swallowtail (Papilio glaucus) caterpillar with
fully everted osmeterium is pictured from Bradford County, Fla..
A convoluted vaginal anatomy can prevent a penis — which in mallards and other ducks is a long, counterclockwise corkscrew - shape organ that can explosively inseminate a female in less than a third of a second (see photograph at right)-- from
fully everting inside her oviduct.