All language subtitles for YouPorn - sex guide See a Penis inside the Vagina

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.