"An egg! Buy why now all of a sudden? Ah fuck this is uncomfortable. It feels like my gut is getting twisted into a knot."
"Yeah, sorry about that. I hear that your first few eggs really suck to make because your body isn't use to it yet. But after a while, you shouldn't even be phased by it."
You felt a slight bit of relief hearing that. "So why am I the one whose laying an egg?"
"No one quite knows how a person is picked to be the egg layer in a relationship. You can even be an egg layer for one partner, and never lay a single egg with a different partner. Either way, it is more or less meaningless unless your partner eats it and then you drink their cum. There is no such thing as using contraceptives in this universe too because of this."
You had a feeling that would be the case. But you couldn't focus anymore as you instinctivly pulled off your lower clothing, and squat down on the floor. The pressure was crazy and you felt like vomiting from the cramping, but your body took over and began pushing out your egg. At first you felt that it wasn't too bad, but when the egg began to push its tip out, the pressure maximizes, stretching your virgin pussy wider than you ever had. Then with a audible "pop" the widest part of the egg exited you and the rest followed easily. To your surprise, the egg didn't slam into the floor and shatter, but gently landed and rolled next to your foot without even a bit of damage. It was smaller than a chicken egg, and had a swirly, light tan and white pattern, like how coffee sometimes looks when you pour in creamer and stir. You no longer felt any discomfort at all.
Picking up your egg, you notice how light it is. "Ohh! That's what female eggs look like, so if we were to get you pregnant, we would have a daughter." Comented your girlfriend. You look at her and then back at the egg. "Really? Hmm, I wonder what the eggs that would let me birth our son would look like?" You asked. Unphased, your girlfriend replies in a monotone voice, a bit annoyed that you completely didn't get her joke. "I don't know, I would imagine it would look exactly like how you getting fucked in your pussy would sound."
You gave her a weird look. "What the fuck? That doesn't make any sense."
"Neither does your stupid question, my loveable girlfriend." Drily stated your girlfriend. "Huh? Oh! Ohhh right, no males."
"ANYWAYS, lets get to fucking. Just set the over there on the kitchen table and meet me in my room." You did as instructed, not even bothering to put your pants back on. When you walked back into her room, she was sitting on the bed, with a clearly phallic object in her hands and a huge grin on her face. "Ready to try the worlds only properly shaped dildo for females in existence?"