what the real name of "method of coupling"?

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I believe the japanese name for it is "Renketsu Houshiki" I found that by using Google. What you could've done is:

1. Visit Google.com
2. Type in Method of Coupling Hentai
3. Do a little searching. Without even clicking a link that showed up.

But yeah, I don't expect you to use google with each question you have. But sometimes, it helps.
Anywho, there you have it. The alternate name.
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and yes, you are right, other than googling it.
you could have checked the User Uploads section for Videos. :P
[size=10]https://www.fakku.net/viewtopic.php?t=9581[/h]