There were 3.9 billion men.

But now,

it's just you...

and your phone won't stop ringing.

Is this some kind of fantasy?

A paradise?

...Or a prison?

You wake up one morning,

and half the world's population is missing.

But they didn't disappear indiscriminately...

It's just the boys that are gone;

the crew,

the fellas,

the guys,

the bros.

We're not sure where they went,

or what happened to them,

but we can say that

you've got bigger problems than

worrying about who you're going to

get beer and watch football with...

The grief comes first.

Then, it's the girls.

And then comes the big question:

Repopulation!

Are you up for it?

Being solely responsible for

repopulating the world,

one female at a time, might sound like fun.

But, in reality, it's a lot of hard work.

Since 1973, male sperm counts across

America and Europe have been going down.

No one really knows why, but,

many scientists believe that

pollution, stress, smoking, and drinking

are probable causes.

To restore the human race,

you, the last man on Earth,

would be expected to do

whatever it takes to boost his fertility.

To raise your testosterone levels,

you'd want to exercise regularly

and take lots of vitamin D.

You'd also have to increase your

vitamin C and zinc intake,

since they're both crucial antioxidants

you need for healthier sperm.

As for alcohol, while it might be

a great social lubricant,

it won't help you get anyone pregnant,

due to the negative effects it has on fertility.

But if the idea of no more beer

keeps you up at night,

that won't do you any favors either,

since getting enough sleep and reducing stress

are just as important!

But less stress is a big thing to ask for when

half the world and their dad is suddenly missing,

and it's up to you to repopulate the Earth!

Given the gravity of the situation,

you probably wouldn't get to enjoy your time

with 3.8 billion eligible bachelorettes.

More realistically, you'd probably be set up in

some kind of fertility clinic for efficiency's sake.

And while you could probably

count on a closed door,

everyone's still gonna know

what you're doing in there...

But hey, they don't need to know your method!

Assuming the internet is still up and running,

you might want to consider getting a VPN.

A virtual private network hides your IP address

and encrypts all your data, so that

no one can see what websites you visit or

get access to any of your personal information.

Now you might be thinking,

"Why do I need a VPN

if I'm the last man on Earth?"

Well, you won't be asking that question

when you're suddenly getting messages

from millions of ladies,

who now know everything about you

from your favorite foods to

where you shop for underwear!

Of course, you don't actually

have to worry about that happening

because we'll never get to a point

where there's only one man left on Earth!

That being said, evidence suggests that

roughly 6,000 years ago,

due to climate or ecological factors

that seemed to have had

a greater impact on the male population,

there was only one man for every 17 women.

In more modern examples,

wars have been the biggest factor

causing gender imbalance

between men and women.

In the absolute worst-case scenario,

scientists estimate that we'd need

a mix of 98 healthy men and women

to establish a stable, non-inbred population.

But of course, the easiest way

to solve this problem is to avoid it altogether!

Let's prevent any

large-scale ecological disasters

by taking better care of our environment.

Let's choose love over war.

And let's keep asking big questions

that will make our society better!

Arouse your curiosity, next time on 'What If.'