Has anyone ever achieved this? I have found in the past if I stroke my nipples, tense my muscles and breath at a quicker pace I can achieve a sensation similar to orgasm, complete with the feeling of ejaculatory buildup, but without actually cumming. Today at the gym I was on the treadmill and decided to push it a little. At around 30 minutes I started feeling really good so I focused my breathing and started to feel my dick harden, like I was going to cum. It eventually passed but I'm excited about trying it again!