If you don’t try anything else first try lowering the saddle nose a bit. If you lower it too much you will start getting some wrist pressure and hand numbness so you will know if you have gone too far. But you are describing perineum pressure and that can most often be cured with a lower saddle nose and if that doesn’t work a saddle with relief cut in or molded in for the perineum. Terry, Specialized and several others make saddles designed just for the problem you are describing. But you can get relief from lowering the nose of the saddle but be aware if you go too far you will have to slowly move it back up till you are comfortable in other areas. However if you are not having problems with your sit bones lowering the saddle nose should help with the one problem you are talking about.
Still as it has been said you might just need a fitting. JMHO