Name That Trauma:: Andre W. on a Threatening Gang

Hi Kindertrauma! I'm trying to identify a color movie I saw on television at least 45 years ago, probably from the 1960s or 1970s. I remember a young, white, middle-class-looking man, possibly played by Michael Douglas or Martin Sheen, being surrounded outdoors in an urban neighborhood by a street gang that I believe was Hispanic. The gang told him they would let him leave unharmed if he could "get it up," apparently knowing that he would be too frightened to do so. I remember the threat, not any actual sexual activity. I may be misremembering the actors, but the scene has stuck with me for decades! Does this sound familiar to anyone? Thanks for any help!