When a woman's vagina is tighter around it's opening and super loose in the inside. Similar to how a 2L coke bottle entrance is shaped. It provides a really strange feeling.
Stick your finger in a 2L coke bottle and wiggle it around.
That way you can get the full meaning of Coke Bottle Effect.
That way you can get the full meaning of Coke Bottle Effect.
by TheGreatDocBrown December 30, 2016