how can you know? if he cumm in you?

Trust me, you'll know. Semen is hot, gooey and often clumpy. Blood flows a whole lot quicker. You will know the difference. If you are a virgin, using a condom is your best defense against STD's and pregnancy. You won't have to worry about any leakage of sperm anywhere. Don't trust any guy who tells you that if he doesn't come inside you that you cannot get pregnant...that is the biggest lie.

First of all, the hymen is broken because of insertion. Second, you would feel the warmth of it. Third, and most importantly, make the guy wear a condom if you're not married.

Put a few fingers inside you and taste it. If its salty and thick(getting runny over time) then he busted in you.

You would know. You would feel a hot liquid inside you.

Someone guys penis's Tense when they ****.

Ask him if he came in you.

him cumming will feel a lot different than blood... promise.. :)