if I were you
A phrase said to introduce advice, i.e. to express what one would do in the interlocutor's situation.
If I were you, I would bewitch him so that he loses the potency to father children all over the place, let alone the potency to rise to the occasion in bed. Source: Internet
"If I were you, I would have been like, 'Yo dude, this is my friend and his husband. Source: Internet
If I were you, I would view it as a learning opportunity. Source: Internet
Marcia Gay Harden plays Lear in the few scenes of the play-within-the-film If I Were You. Source: Internet