The lobster nose is located on the short pair of antennae called antennules located between the long prominent antennae. The antennules allow lobsters to smell minute quantities of odor-producing chemicals. Scents are detected by receptors at the base of the tiny hairs fringing the edges of the antennules. Although it may seem strange to think about smelling underwater, keep in mind that the insides of your nostrils are moist and hairy. Attracted by the smell of the baitfish, lobsters climb into the kitchen for a bite to eat.
Lobsters can easily walk into the kitchen, grab a bit of bait, and leave.
When the lobster is finished eating, he buries the leftovers for later consumption. Perhaps the parlor looks like a good hiding place. If you put a foreign object near a lobster, he'll investigate. I think that may be why lobsters enter new trap designs or go to traps set in new areas. I've watched lobsters in large aquaria.