It's odd, now that when you think of a question about your new reality, your given a complete understanding of the situation regarding the question so you can determine your own answer. You have Billy's memories and he has yours. You know as much as two people can know about each other.
Billy looks at you, "Thinking about sex?"
You smile, and answer, "Yes I am. I think it is our mission life to fuck each other until we can screw no more."
Billy smiles, "I agree to that. We are sexual beings. It is what we do."
You interrupt Billy, "Yes, I just want to be careful with other people we involve with ourselves."
Billy pauses a moment, and nods yes, "I am loyal to you, you know that as good as I do. You also know what we can do now. We can share responsibly."
"We are in agreement." you declare adamantly.
The two of you walk into the living room where Carl is sitting in a recliner with each of his hands busy massaging a nipple and his cock buried in his mouth.
"Wow. Billy did a great job on you," you say as you kneel down next to Carl, stroking his equine enhanced muscled legs. "You look incredible, the rubbery spandex skin really shows off every detail," you say admiring his large rubber encased smooth scrotum.
Carl doesn't lose his focus and just gives you a "Mmmmpppph....mmmmmmmppph" while he nods yes. Billy joins you as each of you relieve Carl's hands and start to suckle on his long nipples, which reward you with a milk with both a vanilla and chocolate flavor. The two of you continue for several minutes until Carl's breasts run dry, at which point you begin to softly bite and tug on the nipple in your mouth. This was too much for Carl, who explodes into orgasm.
You stand back and join Billy, who is sitting down on the couch. "I think I like the free milk," you say smiling to Billy. Billy reaches over to your vacuumed formed nipples and gives you a slight brush of the titties.
"I like how you taste too my dear," beams a proud Billy.
Carl's cock slides out of his mouth, as he pants in post orgasmic bliss, "So, is there anything else you two would like to share with me? Because so far, I like everything that's been done."
Then you realize, Carl didn't get the manual in his head like you and Billy did.
Carl asks, "So is there a manual to that dildo somewhere that tells me how to use it?"
You grin and loudly whisper to Carl, "You will need assistance from us to use it."
Carl asks, "So, how about a couples night tonight?"
You and Billy look at each other give each other the same naughty smile, and both of you nod "Yes" to Carl.