Of course, the rating will take into account many indicators. Therefore, a single standard is impossible, because everyone has his own standard
It all boils down to whether you got pleasure or not. And the rest is already secondary, it does not make sense to assess the ways to achieve it
Oh my God. Ways of achieving pleasure are the most important. Cum you can with the help of your hand. It's not the same as sex. Here you can not exaggerate everything, it is really a complex system that should depend not only on the characteristics of countries, but also on personal preferences
Individual preferences are another conversation. Usually everyone finds in the application some of their advantages, the developers do not adjust it to the tastes of all.