YOU SAID:
I like cake and he does too.
INTO JAPANESE
私はケーキが好きで、彼も好きです。
BACK INTO ENGLISH
I like cake and I like him too.
INTO JAPANESE
私はケーキが好きで、私も彼が好きです。
BACK INTO ENGLISH
I like cake and I like him too.
That didn't even make that much sense in English.