Bueno dale sí... ¿pero te ponés otro forro?
OK sure... but will you put on another rubber?
Caption 47, Disputas - La Extraña DamaPlay Caption
But can you put on another what?
Many of you would be more familiar with the word condón or preservativo, two synonyms for forro in this context. In a dictionary, you'll find that forro more innocently means "cover, case or interior lining" of a ski jacket or waterproof luggage, say. But in an Argentine bedroom, forro usually refers to a "condom," as it does in this line from the show Disputas.
What's more, graffiti all over Buenos Aires declares: Por amor usá forro -- "For love's sake, use a condom" -- as part of a grassroots campaign promoting safe sex. Another slogan in the fight against AIDS -- No seas forro, usá forro -- points to an alternate meaning of forro in local slang: "idiot."
An aside: X Amor is short for por amor because "x" is familiar to us all as the multiplication sign, and when you multiply in Spanish, you say dos por dos for "2 x 2." In a similar vein, Lo+Tv works for us because "2 + 2" is dos más dos. Keep your eyes open and you may notice lo+ used casually in place of lo más throughout the Spanish speaking world.