Members of many other races can easily be manipulated through sex so I would bet good latinum that they are not only capable of it but are very good at it. I doubt they would have a lot of interest in it themselves because that would be a weakness the founders would not want them to have. They would be much like Data - programmed in multiple techniques but incapable of deriving any pleasure from it and incapable of being emotionally influenced by it. But I bet they could put on one hell of an act!