The whole point of ejaculation is to get the sperm as deep in a woman as possible, and got it yo stay there until the job is done. Semen that spills out of her pussy after sex can’t impregnate her, so it’s no surprise that it doesn’t pour out like you see in porn.
Porn isn’t real, it’s entertainment, and the porn studs often pull back and ejaculate shallow so that the viewer gets ti see in flowing out of her rather than jamming it deep.