A state of mind comprising resolute frustration where you are being lectured on a slab of depressingly tiresome subject information by a rather hot and pert-breasted female. Hence you are not able to concentrate on the tiresome material presented and you just long for a small glimpse of pert, perky and unfettered cleavage.
Example - Watching some crappy property developing programme which is presented by a fit and tasty 35 year old doris with baps like space hoppers and nipples like chapel hat pegs. We have all been there. "Oh my good lord, not another greedy clueless geek trying to be a high and mighty property developer, I just want to see some proper heaving ladymeat - this is another case of Beenylust"