After helping you open a jar, your futa GF demands to give you a handjob. After seeing your cock, a theory she’s been thinking of is confirmed. Every time she emasculates you, her dick gets bigger and yours gets smaller. She compares your cocks, making you hold yours up next to hers, then goes over all the times she’s emasculated you recently. It’s just something you’re going to have to learn to accept–unless you want your penis to shrink down completely. After laughing at you and comparing some more, she knows the right way to put you in your place…to fuck your ass! As she fucks you she makes you admit that she’s much stronger and more in control than you. Your relationship dynamics are going to have to change.