A little over two hours — that’s how long the viewer must spend in the company of Amy Schumer as Amy in “Trainwreck,” for which she also wrote the screenplay. That’s a lot of Amy, as the “Amy, Amy, Amy!” of the Japanese title rightfully suggests. For Schumer fans, it’s a real treat. For those with less than moderate enthusiasm for the raunchy comedienne, it can get just a wee bit taxing.

Teaming up with director Judd Apatow (“40-Year Old Virgin,” “This is 40”) to squeeze in as many references to male genitalia, oral sex and body fluids in a single scene, Schumer takes sexual honesty to a height “Sex and the City’s” Carrie Bradshaw could only dream about.

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