The following variations are possible : In the basic standing position , both partners stand facing each other and engage in vaginal sex .
In the basic standing position , both partners stand facing each other and have vaginal sex .
In the basic standing position , both partners stand facing each other and have vaginal sex .
让句子变得简单: The following variations are possible : In the basic standing position , both partners stand facing each other and engage in vaginal sex . 输出: