Hi jmanfriendly123, how are you?
I'm not a doctor, but I am a man too.
What I can tell you, is that the ammount of ejaculate depends on many factors. For example: How often you masturbate, age, mental mood, diet, time spent arousing yourself... lol.
Don't compare yourself to the men in "those" movies. Most of the men in "those" movies, use some sorth of inhibitors/drugs/chemicals/natural enhancers, and sometimes, trick photography is used, (special effects).
Keep in mind that it takes some time for ejaculate to reproduce, therefore, the more often you masturbate, the less ejaculate you will ...eject, or in this case, ejact! lol.
Also, the company and touch of a female partner, can enhance the whole production factory. lol.
Try cutting down a little, i know it's hard to do, especialy when it's hard ....to do! lol.
When in doubt, consult a Professional, and if you do so, pls keep me posted. I too would like to know how often is safe to... or any dangers within ? lol.
Happy mastur...! TC.