 The investigators hypothesize that smoking quit rates on the patch will be higher after CET. To address our hypothesis the investigators first want to develop a proof of concept procedure that demonstrates that repeated cue exposure in the laboratory results in the lessening or extinction of cue-induced craving. In addition, the investigators are interested in the contribution of nicotine withdrawal to cue-induced craving. To this end, the investigators propose to include a control group without nicotine replacement i.e. placebo patch that will also undergo the repeated cue exposure procedure. 