Ah! I've never heard of such a thing!

哈 简直闻所未闻

My son would gain a title,

犬子将会获得封号

I should like to be a countess.

我想成为女伯爵

Done.

成交

On the other hand, the claim that one--

另一方面 说

but to attract females is less crazy.

而是为了取悦女性就不那么疯狂了

as a reference to evolutionary biology,

这是进化生物学中的一个词

The genome starts piling on mutations that mean nothing;

基因积累了许多无意义的突变

and create certain moral categories, certain important moral categories

新建一定的道德范畴 一定的重要道德范畴

and things of this sort that constitute,

以及这之类的事物组成

it would be incomprehensible,

如果最普遍的行为并非最有利的行为

But then he takes it back.

但随后他收回了这个说法