In Time, Maya Salavitz reports on a new study indicating that:
... at least in low, oral doses — the effects of methamphetamine may be much more like those of ecstasy than previously believed, increasing sociability and playfulness, and belying its bad name. What's more, the study finds that the empathetic behavior exhibited by ecstasy users may result from a reduced ability to read certain social cues, rather than any enhancement in sharing other people's feelings.
Okay, the MDMA part makes sense to me. Oxytocin (released by MDMA) calms my amygdala, making me less vigilant. So, I can relax. In fact, this seems to be what happened, according to the article:
"We found that the drug actually decreased the capacity to read negative emotion, specifically fear," says Bedi. Reducing the detection of fearful faces might increase "empathetic" behavior — even while reducing the ability to accurately read feelings — by making people more likely to get closer to strangers, rather than maintaining distance because of fear.
BTW: The researchers cautioned that dosage and safety were critical elements of this study. If you're huffing on the meth at home, you might not feel as huggy.