When did Luke Skywalker lose his virginity?  I don't know.  I've never seen it mentioned.  Maybe he lost it on Tattooine before the events of Episode IV, though he always seemed over-eager, unlike Han Solo, who had more 'balance' in his walk.  That's why Leia liked him more.  She was both repulsed and attracted to Han's sexuality.
     So, it is possible Luke never got laid until after Episode VI.  It must have been weird for him to have a crush on Leia, only to find out she was his sister.
     One would most definitely assume that Luke had discovered masturbation before the events of Episode IV.
     However, this raises a question...do jedi ever masturbate?  They are men, and they eventually need a release.
     Hard to jack off when your master is always around, though, haha.
     I would say that female jedi definitely masturbate.  They just don't talk about it, haha.

     Another question is if Annakin and Padme had pre-marital sex.  Hmmm, that's a thinker.  Maybe they went to third base, or maybe she gave him head once or twice.
     I guess what made it exciting for Annakin and Padme is that their love was forbidden, but when they hung out, they had nothing to talk about, and things were really uncomfortable.

     Still another question is "Was Obi-Wan a virgin?" 
     Surely, he must have gotten laid at some point.
     One thing is for sure, he never got laid on Tattooine.  No woman wants to fuck a hermit.

     Meanwhile, once Annakin became Darth Vader, he never got laid.  I'm sure his equipment got burned.  If his outer ears got burned off, so did his dick.

     Did Leia ever get laid before Episode IV?  I would say she did.  She was a rebel.

     Did Gran Moff Tarkin ever get laid?  Probably in his youth, but not in a long time.  Army personnel always get laid during R & R, or shore leaves.  Women love to sleep with men in a uniform, evil or not.  In fact, the evil might be part of the attraction.

     Uncle Owen and Aunt Beru didn't fuck anymore by the time of Episode IV.  They were more concerned with surviving, and it was hard to feel randy with Luke around.

     Jar Jar never got laid.  That is for sure.

     I'm sure Jabba had services done for him whenever he wanted.  He was getting older by the time of Episode VI, but still really enjoyed having scantily clad half-naked slave women around of different species.

     Lando got laid a lot, and could never get enough.  Lando was no stranger to pussy.  He was pimping Bespin like there was no tomorrow.

     Mon Mothma wasn't interested in sex much.  She was kind of prudish, even in her youth.  She probably did not fuck much after the age of 24.

     Boba Fett?  He had a ship.  He had bad ass armor.  He probably had whores in various ports.  Where do you think all his money went?  If I was a bounty hunter, that is what I would do.

     Chewbacca was a family man.  Very good-natured.  I don't think Chewy was jumping from bed to bed.

     I'm pretty sure that after The Empire was destroyed, that everybody was fucking to celebrate that night.

     Do Stormtroopers ever get laid and fuck?  You would imagine they would have to, when on shore leave, and only on shore leave.

     Space Pirates and Mercenaries are always fucking, you can be sure of that.  It is what being a pirate is all about.  And loot.

     So, sex and sexuality is always suggested in Star Wars, but never carried out.  Somebody has to fix that.  Well, there are some things on redtube, but there needs to be more.

     What do you think smugglers carry on their ships besides stolen goods, and slaves?  Star Wars porn, some of it 'inter-species'...haha.

     Do Sith get laid?  You would have to imagine that they are all into that, unlike the boring jedi.