Can hold a contraction on only some muscles

[HeavyMetalFan]

I am able to squeeze my pelvic floor muscles and my asshole contracts. I am able to hold this butthole contraction indefinitely.

When I squeeze my pelvic floor muscles, I also raise my penis and testicles. However, they only remain raised for a maximum of around 1 second before they lower again. I must totally release and resqueeze my whole pelvic floor muscles in order to raise my penis and testicles again. I feel no muscular fatigue, the muscles involved simply involuntarily relax.

Although I cannot hold a squeeze on the muscles involved for raising the penis and testicles, I can repeatedly relax and squeeze the muscles over and over again as much as I want. I simply can’t hold the contraction.

Is this normal? Or is this suggestive of pelvic floor dysfunction? Google doesn’t help me. ChatGPT tells me it’s normal, but doesn’t give me a good source.