This filmization of Neil Simon's first Broadway hit was adapted for the screen by Norman Lear. Once we get past the illogical casting of middle-aged Frank Sinatra and twentysomething Tony Bill as brothers, we're home free. Sinatra, a swinger supreme, uses his New York apartment as a harem of sorts for his legion of lady friends. Bill, wishing to break loose from his protective parents (Lee J. Cobb and Molly Picon), moves in with older brother Sinatra, hoping to emulate his sibling in the sex department. Sinatra teaches Bill the tricks of the trade--to his everlasting regret, since Bill soon wins such prizes as Jill St. John and Barbara Rush away from Sinatra. The third act finds Sinatra behaving more like a parent than his parents, steering Bill on the straight and narrow and finally settling down with Rush. Also appearing in Come Blow Your Horn is singer Phyllis McGuire (an offscreen Sinatra vis-a-vis), Dan Blocker, and, in the uncredited role of a wino, Dean Martin.
~ Hal Erickson, All Movie Guide