The Sarah Connor Chronicles episode "Vic's Chip" featured a Terminator who either married a woman - or replaced her husband convincingly, I forget - and who was (to quote Data) "fully functional, and programmed in multiple techniques." Which could potentially have involved pegging, sp he'd need an anus as well as meat & two veg. He killed her eventually, of course, but I don't think it was by robotically pounding her to death. Might have been, can't remember.