Recap of the first two parts

In the year 3'001 a man from the past named Fry has been convinced by his Asian colleague Amy to use a revolutionary machine to swap heads. She left to have fun with Fry's body and authorized Fry to have fun with hers. He was caught pleasuring himself by Leela, captain of the spaceship on which he works and his girlfriend. She insisted to swap heads with him and have Amy's body have lesbian sex with her, to spite Amy. The latter irrupted in their bedroom just after they were done in the act, much to Leela's vengeful satisfaction

Part 3: Leela leaves

« Ha! That's what you get, Amy » Leela gloats « My body and yours just had sex. And there is nothing you can do about it »

« Eewww! » she scrunches her face in disgust « What the hell! »

« That's right! » Leela continues « And now, gimmie my boyfriend body back! »

« Uh, Leela... » Fry interjects « Didn't you mean she should give ME my body back??! »

« No » Leela turns to Fry « You are going to sleep here, and she is too. I don't want any more funny business. »

« You don't trust me??! » Fry asks, a bit hurt for the lack of trust

« I trust you, Fry » she replies softly « I don't trust her! She convinced you too easily. Who knows what she might convince you to do next. Besides, I also wanna have some time alone with your body. You had the chance to test my body, can't I test yours? »

« I guess so » Fry smiles timidly, while Leela puts back Amy's clothes on her body.

« Let's go, Amy » Leela pushes her out of the room « You can stay here, Fry. Me and Amy are going to do just fine by ourselves »

Several minutes pass, while Fry lays on the bed in silence, getting a feeling of his girlfriend's busty body he now was the sole control of. Eventually he gets worried, so he puts his lacy black underwear back and he decides to walk to the laboratory, enjoying the satinized feel of the stockings slipping on the cool and smooth floors of the empty corridors. The illumination of the hallways make the living quarters and the entire complex look like a deserted but immaculate hospital, the echo of his steps barely audible in the lonely building. While he walks alone, wearing only lingerie, he feels like the female protagonist of a horror movie, waking up in her fancy mansion to go and check on an eldritch sound she heard in the cellar.

Eventually, he arrives at the laboratory, just in time to see the head swapped women come out of the room. He would realize only when Leela left to go to her home that they forgot to resize Leela's head to be proportionate to Fry's body, since both their heads were the same size at Amy's, one naturally, and Leela's transformed during the last swap. She says goodbye to them and then leaves to go sleep at her home, satisfied by the fact Fry's body won't be used to cheat on her, at least for the time being.

As soon as Amy is sure that Leela is gone for good for the night, her smile changes slightly « Oh! She's finally gone! » she sighs, before slapping Fry's butt with vigor.

Fry gasps for the surprise « Ow! What was that for?» he whines, massaging the slapped part to alleviate the burning feeling.

« Oh come on, Fry, don't you get it? » Amy smirks « I was pretending to be upset to trick Leela into leaving. I had so much trouble trying to avoid getting an erection when I saw my body and Leela's hugging each other naked in bed. »

« What??!! » Fry exclaims for the shock « You mean-?? »

« Yeah, Fry. This girl swings both way » she points at herself with a finger « Oh, by the way, you did really a number on my cunt, eh? This thing feels used, man! I still feel the afterglow of the sex now. Whoo wee. Come on now, let's go for round 2 » She starts dragging Fry to the living quarters again.

« What do you mean??! » Fry protests « I can't go to bed with you. Leela would kill me! »

« These bodies have just been into bed together » Amy replies, raising an eyebrow « And Leela was thrilled that happened. One time more would make any difference? »

« I suppose you are right » Fry lets himself get convinced again too easily.

When they get into the bedroom, Amy turns Fry around and starts running her hands all over Leela's body. If only she knew Leela did the same thing when she was piloting her body earlier that same night. She slips a hand inside Leela's panties, making Fry blush and an inexorable warm envelop Leela's body.

« I wanna feel every inch of your girlfriend, Fry » she whispers in his ear, making Fry notice a faint stench of alcohol in her breath.

« Are you drunk?? » Fry asks, worried that Amy might be too uninhibited to consent properly

« Nah! Just tipsy » Amy smiles. « Would a drunk person be able to do this?? » she walks beside Fry, before doing a cartwheel ending in a split on the bed, kicking out the boots in the same fluid move. Fry feels the heat radiate from his body, aroused and impressed by Amy's limberness. In a couple of sinuous moves the rest of Amy's clothes leave her body for the third time in the same night, after which she lays in bed in a seductive pose, inviting her partner into the bed. The same experience Fry and Leela had one hour prior repeats, with the same bodies but a head of difference. The experience is slightly changed by the different partner, making the roles in bed, the movements and the love making a new experience altogether, with more kisses and a more passionate, more urgent and rushed moment of climax. They fall asleep hugging together, not caring of what Leela may have to say in the morning.

They are roughly awoken by an automaton bursting in the room. It is bender, the self centered and foul mouthed robot that accompanies Fry and Leela in every one of their deliveries to other planets. His robotic eyes can't convey emotions very well, but his body language speaks of shock and panic

« Leela is dead! » he shouts to them!

« WHAT???! » Amy and Fry exclaim in unison, sitting up in bed like they were spring activated mannequins rigged to jolt and scare the attendance of a carnival's ghost house. They are too shocked for modesty, flashing their boobs to the robot.