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  • Answer 1/8

    What sex are sperm?

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    • Correct Answer:

    By themselves, sperm don't have a gender, but they're in charge of what gender the baby is.

    Dad's sperm carry either an X or a Y chromosome, and there are about the same number of each. Y-carrying ones swim a bit faster, and they don't live as long. But you need serious (and expensive) technology to shift the baby's gender odds from 50/50.

  • Question 1/8

    How long can sperm live for after they leave a man's body?

  • Answer 1/8

    How long can sperm live for after they leave a man's body?

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    • Correct Answer:

    Sperm can kick it inside a vagina for several days, but if they're outside a body, they're done for quickly. So don't worry about the dried stuff on sheets or clothing. Heat and chlorine also kill sperm off.

  • Question 1/8

    If you want to make more sperm, you should:

  • Answer 1/8

    If you want to make more sperm, you should:

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    • Correct Answer:

    In a study, college-age men who exercised at least 15 hours a week had up to 73% more sperm than the couch potatoes. But your activity choice matters: Cycling more than 186 miles a week can also lower sperm quality.

  • Question 1/8

    What is semen, mostly?

  • Answer 1/8

    What is semen, mostly?

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    • Correct Answer:

    Sperm make up only 5% or less of your semen. It's also got amino acids, protein, sugar, and minerals to nourish those baby-making swimmers.

  • Question 1/8

    An orgasm means you'll see semen.

  • Answer 1/8

    An orgasm means you'll see semen.

    • You answered:
    • Correct Answer:

    If nothing comes out when you climax, semen could be going into your bladder. It's not dangerous, but you may want to check with your doctor or a specialist called a urologist, especially if you're hoping to become a dad.

  • Question 1/8

    About how many times would you have to ejaculate to get 1 cup of semen?

  • Answer 1/8

    About how many times would you have to ejaculate to get 1 cup of semen?

    • You answered:
    • Correct Answer:

    Most men produce about 3/4 of a teaspoon at a time, less than a typical dose of cough syrup. But a guy who's very well hydrated or who has gone a long time without an orgasm could make more.

  • Question 1/8

    Does semen glow in the dark?

  • Answer 1/8

    Does semen glow in the dark?

    • You answered:
    • Correct Answer:

    Not on its own. But like other body fluids with protein -- such as blood, sweat, saliva, and urine -- semen will reflect ultraviolet or "black" light in a way we can see. Because of this, British spies used it as invisible ink during World War I. Now, crime scene techs use different kinds of light to help find "biologic" evidence, including semen.

  • Question 1/8

    Semen is a good skin moisturizer.

  • Answer 1/8

    Semen is a good skin moisturizer.

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    • Correct Answer:

    Despite the popular lore, there's no evidence it works. And in rare cases, it could do more harm than good. Proteins in it can trigger a rare allergic reaction. This will cause pain, itching, burning, and swelling. Since the exact makeup of semen varies from person to person and from one time to the next, a semen allergy can crop up even with a longtime partner.

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Sources | Reviewed by William Blahd, MD on August 17, 2017 Medically Reviewed on August 17, 2017

Reviewed by William Blahd, MD on
August 17, 2017

IMAGE PROVIDED BY:

Science Photo Library / Getty

SOURCES:

Harvard Health Publications: "Boy or Girl? Determining a Baby's Gender."

SexInfoOnline: "Sperm," "What is Semen?"

Harvard School of Public Health: "TV viewing, exercise habits may significantly affect sperm count."

Outside: "What Sports Lower My Sperm Count?"

Kinsey Confidential: "Q&A: Is There Any Way To Have More Sperm Than I Do Now?" "Q&A: I Don't Produce Semen When I Climax."

Owen, D. Journal of Andrology , July-August 2005.

UpToDate: "Evaluation of male infertility."

The Telegraph: "MI6 'used bodily fluids as invisible ink.'"

Forensic Resources: "Forensic Tests for Semen: What you should know."

International Society for Sexual Medicine: "What is sperm allergy?"

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