This asana is mainly done by yogis for being siddha, so it is called as Siddhasna. The main function of this asana is to awaking the power of kundalini.
Sit down and stretch your leg’s in front of you.
Now bend the left leg, hold the heel, and place it near perineum.
The sole of the left foot should be placed against the right thigh.
Now bend the right leg and place the right foot on the left ankle.
The heel of the right foot should be placed at the at the root of the genitals.
This asana awakens kundalini Shakti.
The asana helps to cure indigestion, constipation, heart disease etc.
The asana helps to cure stiffness in joints of loins.
So, what do you think ?