How to ensure that you are entering the correct hole

A serious consideration. Experienced men will usually know what is entered (although mistakes can happen even to the experts), but for someone new might (and should) be worried. Women have three holes under his body (although only two holes that can be entered) and the area of the coil was confusing as the Grand Canyon. Most likely an error if the penetration from behind. Many girl lying on her stomach / belly with sweet wait vaginal intercourse, and only raised roughly by the penis strained and ready to get into the buttocks.
The simple way out is to just let her guide you with his hands. not at all embarrassing to recommend that women do just that. If he does not offer a clue, then follow these steps:
Position the woman lying on her back (supine); Put your penis between her legs and against his cock (small surrounded by pubic hair), and then move the tip of the penis down, tap it gently until the parts can be entered. Part that you touch is half way to the target. Let that part well lubricated to make the entrance more easily and clearly.
The position of a woman lying in the front of the body (stomach); starts with putting your penis in between her legs and against the mattress, and advance to the top, if you start by putting the penis against the buttocks and moves down the first hole you encounter is anal.

Try it.....Don't miss it !