Answer:
Lascivious means: Lustful, lewd, wanton; eliciting or expressing carnal desire.
Usage: Here is the perfect substitute for the overworked metaphorical sense of "dirty" as in, "The lascivious jokes told by the fraternity brothers made Chastity uncomfortable all weekend." But we have to rue the unwarranted oversight of the verbal counterpart of today's word: "Our old friend, Tucker Doubt, lasciviates evenings in the red light district of our fair city."