Sorry, Josh and Donna, ”West Wing” creator Aaron Sorkin has no plans to relieve that sexual tension anytime soon. The two-time Emmy winner explained that he’d like to make the NBC drama sexier and more romantic, but he just can’t ”seem to pull the trigger on writing it. It’s been a two-and-a-half-year cold shower.” Not helping matters: He didn’t keep the home fires burning between the prostitute law student (Lisa Edelstein) and Sam (Rob Lowe), and Timothy Busfield’s Danny went missing in action before we ever saw a smitten C.J. (Allison Janney) give him that big exclusive. Asked when his characters will take that overdue trip to nookieville, the recently separated Sorkin shoots back, ”Not until I do.” Uh, more information than we needed there.