First of all, lets keep in mind that TNG was in the early 90's. Sex on TV was still basically limited to late night shows, certainly not Prime Time TV. Second, they did a great job of slipping in inuendo into most everything that Riker did!! Remember the episode where he and Ro got it on because no one remembered anyone else? Any of Troi's relationships were lame, but Paris/Torres was funny because it reminds me of most people that I know. Seven of Nine was crazy hot in those skin tight suits, and T'Pol in Enterprise was fully naked in at least three episodes. Star Trek is not necessarily a series for overt sexuality. Maybe it could have been addressed more, but by this point, we are all accustomed to the way it is and too much sex seems weird. IE Enterprise. Some of the attempts they made seemed uncomfortable becuase I am not used to seeing that in a Star Trek epsiode.