Based on an Italian film released in 2016,  Paolo Genovese’s “Perfect Strangers,” Robert O’Hara’s new play “S—. Meet. Fan.” contains a “trigger warning” in its script: “This play is a blistering vulgar satire on Male Toxicity and White Privilege,” Mr. O’Hara writes. (The capitalization is his, not mine.) He adds, as a tip, “Allow the laughter to indict the audience and lure them into a sense of comfort.”