Comma Sense: Complex Is Sexy
Sentences with complex predicates: When both parts of a predicate modify the same subject, there’s no need to separate them with a comma.
He lowered himself to her vulva but did not get a warm welcome.
Now mark the unnecessary commas:
To render him impotent and weak, Delilah waited for him to fall asleep, and cut off all his hair.
Our bed was round, red, and velvet-covered, and vibrated when we put quarters into the machine.