"But I don't understand. As your partner in hypothetical reproduction, do I not have access to your ova?"
"Well—I guess, but—"
"And was your previous objection not based on my earlier lack of permission, thus—I quote—'all I'm giving you is the napkin, Sheldon'?"
"...Sweetie, you know how sometimes you say things and they make total, non-creepy sense to you, but they kind of weird the rest of the human race out?"
"Yes."
"And you know how I'm supposed to tell you when it's those times?"
"...Yes?"
"This is one of those times."