Responses
Apparently you put a lot of lube on the head and then only rub the head of the penis, not any of the base. And then just like women when they squirt, men are supposed to feel the need to pee, but instead a clear liquid comes out. And the liquid is in a large volume and water-like consistency unlike normal semen with sperm. You can look it up on pornhub etc. I have no idea if it actually works though or if it's actually just pee (though, women's 'squirt' is also a fairly unknown phenomenon as to whether it is just a form of pee or something entirely different). What they did in this manga is exactly what I just explained
I didn't even know 'male squirting' was a thing before this... I thought it just meant ejaculation