I got a big sampler kit from NuVape, all tasted like perfume. I think the perfume taste comes from expiration. Can also happen if you are storing your juice where the sun can hit it. I personally would rinse my atty really well in hot tap water, blow it out, and add twice the amount of juice you would normally, and give it another go. Once it starts vaping normally, usually takes a few pulls, and it still tastes like perfume, your juice has gone bad.
In all fairness, Nuvape was my first juice purchase, before my taste buds came back, so that may have contributed to the taste as well.