Hey there...
That is a good idea in theory...
But, i've tried that... and oh man... when one errant strand gets running right at the tip by your urethra, it can be like a papercut when a hair kinda saws it's way into you... (sensitive there)...
So, as long as yer lady's hair is around your shaft, that's cool... just watch it around your tip (gotta angle it right )
just speaking from experience IMH
Have a great week!