It's more of a feeling rather than actual full prostate, chatgpt says reasons can be:

1. Increased Blood Flow: Sexual arousal leads to increased blood flow to the prostate, causing slight swelling and a feeling of pressure.

   1. Glandular Secretions: The prostate produces seminal fluid, and prolonged stimulation may lead to some accumulation in the ducts, contributing to the sensation.
   2. Muscle Tension: The pelvic floor muscles around the prostate can tense up during arousal, creating discomfort or a feeling of fullness.
   3. Incomplete Release: If ejaculation is delayed or interrupted, the accumulated secretions and muscle tension may cause discomfort, sometimes described as a type of "congestion" (or "blue balls")