Yep they are, unless your pelvic floor isn't already hard like a stone by contracting these muscles unwillingly. These contractions are mostly controlled by the parasympathetic nervous system, so you can't do shit about that. So freaking out alone after a hard training session whilst feeling some fatigue symptoms can easily put your body into a state of fight-or-flight response. But there are more underlining causes like hip deformity, spinal misalignment (especially in the lumbar region) or just sitting day in and day out in a wrong position. The only way to release the tension are pelvic floor exercises, reverse kegels etc. I bet almost everyone in the Boo Boo's and Band-Aids section who came there over the years with horror stories about how PE broke their dicks had some pelvic floor related problem in the first place. That's why I truly believe this topic is tremendously important for the brotherhood.