My direct experience contradicts the conclusions of this study.
I am married, I am what many consider a white collar worker / manager type.
My beard has not caused a reduction in the level of intimacy (to put it politely), and I am quite satsified.

I might also add that before I was married, my beard did not seem to repel any of the women I knew (I don't mean this in the carnal or biblical sense).
BTW, I haven't shaved in 23 years and 1 month, but I do get periodic haircuts.