Legends Rubbers, a small Australian company that sells its condoms in retro-looking tins for the cool effect, made national news by signing up controversial sex-positive artist Hazel Dooney to design some tins for them. It's not the first time prophylactics have collided with the art world; Keith Haring himself "considered ideas for designing condoms," and condoms are a staple medium for a certain breed of working artist. Sex-themed art as a marketing tool seems like a natural fit. And now, a new psychological study confirms its wisdom. Why "dirty thoughts" make men buy things—and a few of Dooney's (racy) past works—after the jump.