Most submissive position.

[LONDONJACK61]

Interesting how the vast majority of replies describe some variation on the doggy theme. I guess having no vision of wjat is happening or when it will happen is a factor of submissiveness.
I suppose it is also to easiest position for the penetrstor, especially is on edge of bed with cunt at just the right height for him to unzip and enjoy

 

[cubbyfire04]

Assuming they're flexible enough... On their back. Ankles and arms locked into a spreader bar and pushed back, attached to the headboard. Holes are open and completely vulnerable, with the added bonus of eye contact and restraint. Fun for girls and boys

 

[TheSocalBreeder]

Doggy style or prone bone.

When I bottomed this is how men loved to take me

 

[LatexSlaveDoll]

What position makes you feel the most submissive, vulnerable, and/or humiliated or exposed? I have found that wearing something pink (Feminized a bit), on all fours with my head down, ass in the air and holding my ass cheeks open, begging is the most submissive for me. Even more than being tied up and cock caged.

For me the most submissive is a Frogtie bondage.