Nightfall is very common. This does not cause any harm or disease.Semen has nothing to do with it being thick or thin:
You can read more on this here: https://lovematters.in/en/news/wet-dreams-top-five-facts
https://lovematters.in/en/resource/ejaculation
https://lovematters.in/en/news/watery-semen-dont-blame-masturbation
Aap iss baare mein humse vristaar mein charcha humare discussion board "just poocho" par humse kar sakte hai.
https://lovematters.in/hi/forum
Nightfall is very common.