I have this pain too- no doubt from the saddle. I am on saddle #6 & I'm not giving up. I think this ligament is the iliofemoral ligament-- from perineum through crease to thigh. I will have a PT/cyclist friend check this- but phone suggestions included saddle adjustments, oinment, and lots of stretches.

I did come across www.howtostretch.com while Googling.

A chiropractor friend suggested abductor stretches, one is sort of like doing a frog swim while lying on your stomach. When I took karate, we actually had a leg stetcher device & I did find various kind on ebay.

My family doctor, she is also a cyclists, has chosen a Sefas man's saddle because of the narrow nose. I ride a Terry bike & I have tried various Terry saddles but not the right one apparently.

I did fall for the gel seat cover idea. Bad mistake! Apparently, gel covers let your sit bones sink in, which means your perineum / vulvar / private areas have MORE contact with the saddle-- thus more friction & more pressure. After Googling this, I learned that this is a common issue with softer seats, ironically, and the farther & faster you ride, the more you need a firmer seat-- I only wish I had known this earlier!