Oh give me a clone, of my own flesh and bone, with the Y chromosome changed to X. And when I'm at home, with the clone of my own, we'll be thinking of nothing but sex. -- Isaac Asimov
I have seen that attributed to Randall Garrett pretty often, but I haven't got any definitive source handy. A quick google turned up this, but I don't know if it's accurate.
no subject
of my own flesh and bone,
with the Y chromosome changed to X.
And when I'm at home,
with the clone of my own,
we'll be thinking of nothing but sex.
-- Isaac Asimov
no subject
no subject