When done correctly, regular sex can improve your relationship and sense of wellbeing. Not to mention it feels pretty darn good. But if you're a man who has sex with women, there's one thing you'll need to master before you can achieve the highest levels of sexual pleasure. It's the When it comes to the female reproductive system, things can get complicated fast. Yes, the vagina -- a term often used when people really mean the vulva -- can be delicate and complex and also, by the way, tough AF. A man's understanding of the vagina can dramatically affect his love life.

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Penetration of the vagina
Like, 'Nope, that's her second belly button. I think I was just young and couldn't believe it. It was really hairy. I think, really, I just saw my mom's friend's pubic hair. I was maybe 10 years old. I just thought, I don't see what the big deal is. I got down there and was overwhelmed a bit, I guess. So I was feeling nervous, and to ease the tension, I looked up at her and said, 'I hope this thing came with instructions!
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In mammals , the vagina is the elastic, muscular part of the female genital tract. In humans, it extends from the vulva to the cervix. The outer vaginal opening is normally partly covered by a membrane called the hymen. At the deep end, the cervix neck of the uterus bulges into the vagina. The vagina allows for sexual intercourse and birth. It also channels menstrual flow menses , which occurs in humans and closely related primates as part of the monthly menstrual cycle.
Sexual intercourse is sex with penetration of the vagina or anus by a hard penis. A man who is aroused can get an erection. The penis swells with blood. It gets bigger and harder and it rises up. If you do not have a desire to have children at the moment, use contraception.