That seems to be what the show implied. It's true that we are programmed as well. However, our programming is not even remotely close to Data's programming. At least not emotionchipless Data. I don't think right now we even have an inkling as to why certain things feel pleasurable to the brain, and others painful. And really it's all about how certain chemicals interact with certain neurons in the brain. So really nobody knows. Why is eating an ice cream so pleasurable? Why is having sex so pleasurable? Sure we know the evolutionary theories, which make sense. But they don't explain why the brain interprets certain signals as desired, and others as undesirable. IF Soong really had this deep understanding of the brain, perhaps he could have given Data those traits as well. However, it seems that even in the 24th century, the Brain is only slightly less mysterious than it is today. I don't think it was due to any sexual urges though. It was more like a curiosity of "what does Tasha want to do with me?" "Oh, so she mounts me and gets pleasure from that? fascinating!"