21 [MF4M] I'm looking for a Dom to use my girlfriend

Hi, I'm a 21-year-old boy, I'm looking for some tough guy so I can fuck my girlfriend. She should be more than 17 cm long or instead more than 3 cm wide in her cock. You could use her and fuck her however you want, yes she knows about this and agrees. I am her boyfriend but also her slave so I would also be yours, my cock is in a chastity cage and my ass is used instead