Id like to post some thoughts regarding a sex-filled Doctor Who universe ;-) Time-Lord -> Sex-Lord, a being of unmatched sexual knowledge and curiosity. Companions -> The Doctor's companions, infamous for their skills in seduction and insatiable appetites. TARDIS-> ( Time And Relative Dimension(s) In Sex) can detect places and moments in time which are full of sexual energy. Daleks -> Still want to exterminate, but only after having brought their victims to orgasm to prove their own sexual superiority. They can utilize their manipulation arm (http://tardis.wikia.com/wiki/Manipulator_arm) to stimulate male, and their gunstick (http://tardis.wikia.com/wiki/Gunstick) as a dildo for females. Time-War -> Sex-War between the Sex-Lords and the Daleks Cybermen -> Sex Robots who are not limited by fatigue or stamina, they can go on forever. Their only purpose is to fuck females, and to turn males into Cybermen. Weeping Angels -> Sex Angels, who can only move if someone, who looks at them, is aroused. They try to seduce their victims and make them achieve orgasm, harvesting sexual energy to send them back in time.
Wow, that's, weird. I have a thought on the Daleks though: what if they 'exterminate' by rendering their partners sterile with nanobots? Also, what if they have an extra attachment: a fleshlight?
Frankly, A time traveling person fucking various people across history sounds a lot of fun. Although I would prefer one separate from The Doctor(or at most a parody). I tend to have an issue with Fan Fiction when i'm aware of the source material.
This, in my opinion, puts it firmly in the realm of BDSM, which, while a potential idea, is not one I personally enjoy...
I believe that my thoughts and ideas went towards a parody as well, in the spirit of some bad XXX porn parodies, only in written words. The monsters, the stories, anything just a cheap excuse to get some action going. "Fucking" instead of "running". Getting naked to save the day. You get the drill ;-)