Original subtitles

and frontal part of intercourse, which makes penetration easier.

Ball play is extremely important. Firstly, just so you allow both the man

the woman to be fully aroused, you allow the entrance of the vagina to open out,

the length of the vagina to lubricate, and for the vagina to elongate and to

balloon at the end to allow thrusting to take place without any discomfort or

pain.

Footplate can involve just normal kissing, it can involve touching,

Footplate can extend beyond that to manual stimulation with the hands of the

gentle areas, both of the vagina and the penis, or even oral sex.

The stimulation of stroking and sucking makes the breast grow in size and the

nipples harden.

They can increase in height by up to a centimetre.

The genitals become excited too. The labia flushes to a red colour and can

up to three times its normal size.

The stimulation of foreplay causes 60 times the normal amount of blood to rush

to the penis, making it fully erect.

So both bodies are now fully prepared for intercourse.

The missionary position is scientifically thought to maximise your

reproduction.

Physiologically and emotionally, it's probably the most intimate sexual union

you can achieve.

The missionary position is quite simply one where the woman lies on her back.

It's the one that's most well known. She will part her legs. She may have her

knees bent or her legs straight out on either side. The man will then get on

of her and enter from above, usually with the woman maneuvering her pelvis

slightly.

To explore what happens to the body during the missionary position, cameras

been attached to the couple's skin, the woman's nipple, the man's penis, and

inside the vagina.

In the missionary position, the vulval lips open slightly.

This allows the penis to penetrate almost directly right up to the hilt,

this position you get direct stimulation of the citrus from the pubic bone of

the man.

The glands, or head of the penis, and frenulum, are highly sensitive, and here

they rub along the vaginal canal, so the position is very stimulating for the

man.

The woman's nipples stay erect throughout intercourse.

Penetration in this position is thought to lead to orgasm for the woman as it

stimulates the G -spot.

The G -spot is an area of very sensitive tissue which is just on the front wall

of the vagina, about two or three inches in or so.

And during this position, the missionary position, the penis will stimulate

this.

As the woman approaches orgasm, she may feel her heartbeat in her vagina and a

throbbing in her pelvis.

At climax, she experiences involuntary muscle spasms in the outer ring of her

vagina and anus.

The male orgasm causes semen to be ejaculated deep inside the vagina, and

thought that sex in the missionary position is much more likely to lead to

conception.

The missionary position allows a pool of semen to collect.

At the cervix, or the neck of the womb. And this can make it easier for women

who are trying to conceive.

After orgasm, the erection subsides rapidly,

and the major and minor lips of the vagina shrink back.

Both bodies now return to a pre -arousal state.