wouldn't it be easier to ask the girl before you meet whether she would prefer you to shave beforehand? if you have grown a thick stubble, but aren't fussed to shave it, then maybe it's worth asking out of consideration. Personally, i think i look better with some thick stubble, but if it meant a girl wouldn't let me perform oral, then i could live with shaving it low (i don't like close shave) with my beard trimmer.