Don't Let Him In

Don't let him in without that safety skin,
Or first thing you know your belly starts to grow.
Fifteen minutes fun
And your lifetime freedom's gone, gone, gone.
Be cool, be wise, and stay your normal size,
Just look in his eyes and say
"Are we prepared, my friend?
Because I do not intend to get stuck.
And I don't rely on luck,
Not me."