How does jacking off before sex make you last longer?

I have heard that if you jack off like an hour or two before sex, it will take longer to ejaculate. I dont last but like 10 minutes and need to last longer for this girl. Please tell about you experiences and or other ways to make sex last longer.How does jacking off before sex make you last longer?just how your body works... after i have sex with my husband the second time is always longer, even if it the next day... its easier for guys after they let one go.... thats the only thing i can think of... lowers ur sperm level and there for less pressure to ***.... so the more u do it the better off ull be...

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