I find submission extremely hot so I am looking for scenes where the girl is a submissive and gives up complete control to the guy. Some scenes which I find

Kissa Sins, Tushy, Waiting and Ready
Kissa gets up on a table with a butt plug and let's Markus examine her.

Melissa Moore & Gina Valentina, Hookup Hotshot
Both Melissa and Gina are very obedient throughout the scene. The hottest part is the foreplay where the guy plays with their pussy and throat while they stand still.

Leya Falcon, FreeUseMilf, Bathroom Break Freeuse
Leya acts like a sex doll that is available for the guy's free use. The guy even calls her a "penis appliance".

Natasha Nice, FreeUseMilf, Glad to be adopted
Natasha lets her stepson freeuse her as he sees fit.

Sybil Stallone, Brazzers, Free for all fuck
Guy's wife buys him a sex doll (Sybil) for anal

Mysha Mynx, Mylfdom, Complimentary milf welcum gift
Mysha is presented to JMac as a complimentary gift with the hotel room. She gets tied to a door and is left for a while.

Alana Cruise, Mylfdom, Submissive Pussy Payments
Alana is given up by her husband since he couldn't pay a loan.

Rosalyn Sphinx & Kylie Kingston, Reality Kings, Sit on it
Rosalyn is treated like human furniture throughout the scene.

Kylie Quinn, FreeUseFantasy, She's for both of us
Kylie is available to the guy for freeuse as part of an arrangement

Sami Parker, Danni Rivers & Sarah Banks, BFFs, Intern affairs
Boss dominates 3 office girls

I came across Teamskeet's Freaky Fembots site. I find it hot that the girls are acting as robots. It's even hotter when you realize they're acting
Kenna James, Beach Babe gets me the follows
Lily Lou, Sexy tutor bot
Kay Lovely, The fembot 2.0

Abella Danger, Sex and Submission, The Sex Toy
Abella is a sex toy who lives in the guys closet and is gagged when not in "use".

Tucker Stevens & Anastasia Knight, Family Strokes, Weird Family Sex Science
Stepmom Tucker and stepsister Anastasia pretend to become maid robots

Jasmine Jae, Sex and Submission, XXXMas Bonus
Jasmine presents to her employee as an Xmas bonus

Carmela Clutch, FreeUseMilf, I will take the blame
Carmela lets her step son free use her as he wishes in exchange for taking the blame for totaling her husband's car

Mandy Rhea & Penelope Kay, FreeUseMilf, The house of your dreams
Mandy is a realtor which "comes with the house" so the couple get to free use her after they buy the house.

Alex Kane & Nikki Sweet, FreeUseFantasy, Make sure she follows the rules
Guy allows Alex to live in his house but the rule is he gets to freeuse her whenever he wants.

Alex Coal, FreeUseFantasy, Keeping him entertained
Wife hires Alex as a nanny to keep her husband satisfied

There was also a series called The perfect maid with multiple parts from Brazzers
The premise in all was a maid who does chores and allows the guys to use her whenever he likes

Penny Barber & Sophia Burns, Perv Therapy, Alex Says
Penny and Sophia agree to do whatever the guy says in order to build up his dominance which also includes sex.

Dava Foxx & Kyler Quinn, Moms Teach Sex, How to fuck your mom
Dava lets her stepdaughter's boyfriend have her for his fantasy

Alexis Fawx, Brazzers, My horny step sons
Alexis Fawx lets both of her stepson use her as a "sex toy"

Havana Bleu, Mylfdom, Cougar Bangs the Bully
Havana Bleu lets a bully bang her as he pleases

Alexis Fawx & Cory Chase, Evil Angel, Taboo 3way
Guy catches stepmom (Cory) and neighbor (Alexis) fucking each other so they let him have his way

Christy Love, Family Strokes, Mail Order Stepmom
Christy is a mail order wife who gives herself to her step son

Nikki Benz, Brazzers, Ring the Bell for service
Nikki lets a the cook fondle her boobs and owner fuck her in exchange of holidays

Lucia Love, Brazzers, My Submissive Boss
Lucia lets her employee dominate her for his cooperation