A pickup line for me can't be planned. The charm has to be innate, inherent, unrehearsed.

I'd been flirting with a cute bartender for months and had mentioned he could do with an inch or two trimmed from his floppy mop.

Several weeks later we're enjoying Scotch and Guinness at a pub on his birthday and he mentioned he hadn't washed his hair in too long.

I sez, "Well, why don't you go wash your mop?"

He sez, "Well, why don't you wash it for me?"

Five minutes later I was in his shower.