^^animals are very sensitive to changes in their owners behavior. They do get a "contact high" (for lack of a better term) but its really just them reacting to their owners being, well, not normal.
if MDMA came out in your sweat, youd see little rolling kids licking each other at every event. on top of that, most animals do not have sweat glands like we do, so even if it were true, there would be no pores deep enough to allow the MDMA into the animal's skin