Phaedrus: (as Lysias, cont.) for those …

for those (erastes/lovers)
then regret (metamelomai)
what they may have well made (eu poiein)

whenever they cease from desire (epithumia)

ὡς ἐκείνοις μὲν τότε μεταμέλει ὧν ἂν εὖ ποιήσωσιν ἐπειδὰν τῆς ἐπιθυμίας παύσωνται

poiein can mean to make or to do; so eu poiein (“well made”) may refer to good poetry or to “benefactions” (implicitly, favors or gifts from a lover).