You just need a urethra. Your urethra is a tube that allows urine to pass out of the body. Ejaculation occurs when fluid — not necessarily urine — is expelled from your urethral opening during sexual arousal or orgasm. Surprisingly so!
When I finally let go and did what felt pleasurable is when it first happened. The intensity just kept increasing, and it kind of hit a plateau before I squirted. I tensed up which I would later find helps the process along quite a bit , then I found myself completely sated.