3. Is it possible a penis won't fit into a vagina? Moving into penetrative sex, you might be wondering how something that size could fit inside of you. The truth is, most vaginas are between three and seven inches long, but they're actually super stretchy and can expand much longer and wider during sex (and childbirth). Very rarely, some penises won't fit, but that's why taking it slow is important. As mentioned above, if intercourse feels uncomfortable (or like the...

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