Area of the body between legs and genitals?

When your legs are streched, for example when you stand or lie on your back, there is a narrow area, about a finger wide, between where your legs join the body and your genitals on the underside of your torso. What is this part of the body called?

Groin, as the OED defines it, seems to refer to "the depression between the abdomen and the upper thigh", that is, an area on the front of the body and not between the legs, where the area lies that I'm after.

Here is an image in which the area is marked in green: https://i.stack.imgur.com/OFaO3.jpg (NSFW, genitals covered). Please note how the 'string' of the taut adductor muscles separates the groin on the front side of the trunk from the area in question on the trunk's underside. The image shows a female body and the perineum is invisible below the genitalia in the shadow between the buttocks.

Image source: https://commons.wikimedia.org/wiki/File:Courageous_Cunt_06.jpg (NSFW, explicit)

The area between the torso and the thigh, where the leg “connects” to the body, is called the inguinal canal or just inguinal. “I still have pain in the inguinal region from exercising.”

As we're talking about English usage, not technical anatomy, I think the groin has to be defined imprecisely as the apex of the two legs. The word has no precise medical meaning. Perineum does, but I am not sure there is a term in English presumably because it isn't very useful to distinguish that narrow strip from a vaguer region called (in Britain) 'the bottom' (or the arse, ass etc). 'In Wright's monumental (Victorian) dialect dictionary 'Last' is defined as 'the groin; in pl. 'the perineum' which suggests confusion. 'Lesk' and 'leesk' are defined there as 'The groin; the flank an the animal' which makes little sense If you're not confused about this region (from a lay perspective) you're not informed! http://eddonline-proj.uibk.ac.at/edd/.