Try this and report back

Since arousal is key to unlocking your prostate orgasmic potential, any method that enhances that arousal is worthy of trying. What you have discovered is similar to something veteran member @darwin wrote about 15 years ago in the thread Try soft palate nursing, it's worth checking out. Also you might want to read the thread Soft Palate Nursing thread.

Good Vibes to You!

Yes, it's an interesting thing to try. I've had a long-standing problem with retaining tension in my eyes during a session. I don't know whether tongue movement actually allows the energy to move down, or whether I'm successfully distracting myself from defaulting tension to my eyes... I guess the result is the same.

Soft palette work is helpful for moving the sexual energy around.