Prurient

prur-i-ent (ˈpruriənt)

adjective
1. Exhibiting or characterized by excessive or inappropriate desire or interest; overly curious.

As Walt Disney once said, when you're prurient, you can find lots of interesting things to do! Okay, maybe those weren't his words.

2. Lascivious, lewd; exhibiting or characterized by an excessive or inappropriate concern with sexual matters; encouraging such a concern.

Filth is in the mind of the beholder; from the right angle, everything is prurient. 
A face agog might signify a prurient mind!

Synonyms: bawdy, carnal, crude, desirous, erotic, fleshly,horny, hot, lecherous, lewd, libertine, libidinous, licentious, lustful, obscene, offensive, orgiastic, pornographic, raunchy, salacious, sensual, sexual, smutty, suggestive, unchaste, vulgar.

3. Causing an itching or stinging sensation. 

Hey you, out there in the cold getting lonely, getting old, can you feel me? Hey you, standing in the aisles with prurient feet and fading smiles, can you feel me?*

Synonyms: crawling, crawly, prickling, tickling, tingling.

*I'm aware that those are not the actual words to the Pink Floyd song, but you get it.