My understanding of what Matt356 has said in this thread is
If you tense the IC muscle:
1. Your erect penis would point at a more upward angle.
2. Your dick slightly retracts into the body.
3. You can feel it retract inside you just above the base of the penis.
All these things happen when you do a Kegel anyway but you also squeeze most of the other muscles in this region. If I do a Kegel where I slowly increase the tension I noticed it’s my IC muscle that squeezes first followed by my BC and then my PC. It feels like a muscle in the front of me squeezes, followed by a muscle under my penis, followed by one in my anus.
So I found it easy to locate this muscle by doing a very weak Kegel making sure you don’t feel any contractions in your anus. Then you get a retraction movement in your penis but no other muscles clench.
Now that I felt I had located the muscle I put it to the test whilst edging. Someone had said in the thread that by using the IC muscle it stopped the muscle responsible for making you ejaculate from contracting (BC or PC). So I was edging away and I kept squeezing the IC every second just gently and it took me alot longer to reach the PONR, and after that short rest gap it took me ALOT longer to re-reach PONR (which is normally I normally do in 30 seconds). It’s like the small IC muscle contractions stopped the short intense feelings you normally get through out masturbation (the ones that gradually get more frequent the closer you are to PONR). Don’t get me wrong it still felt nice and my erection was constantly great through out.
Now I have a real ache in my IC muscle. From contracting every second or two for a long time!
NExt time I am going to try this whilst having sex and report back.