New York photographer Collier Schorr gets pretty out there in Jens F., a large solo that is still on display at the Museum of Contemporary Art/Denver. It was originally part of Star Power, a series of exhibits on view when the building opened last fall. Using photos, montages, collages and even sketches, Schorr zeroes in on a very attractive teenage boy and poses him as though he were a female nude; it pays homage to Andrew Wyeth's model and could-be lover, Helga, of whom he made secret paintings. Given the risks she took, Schorr was wise to take these photos in Europe, where attitudes about sex are more open.