Any man who shaves his beard for a woman deserves neither.

Who cares your the one who’s paying.

Just keep it tight and clean especially around your lips. Keep the facial rubbing down. Be gentle and be aware. Eventually everything will come normal. You’ll figure it out.
I’ve had one for over 30 years, gives me my “edge” and I’ve learn to instinctively work around it. I’m not savaging her face or her tit when I’m motor boating.
Just keep it tight and clean. Don’t be grizzly Adams.

As long as your facial hairs aren’t dirty or scratchy then it shouldn’t interfere with any activities.  
As far as preferences, we are all unique and what I like may not  match another provider’s likes.  
You should do what suits you.

Customer: Waiter! What's this hair doing in my soup?
Waiter: Looks like the backstroke.
.
Ooops. Wrong joke. Fly. FLY. What's this FLY doing in my soup?
.
Lesson: Don't grow facial flies.

I personally love a beard on a man

I find it so attractive and manly… hehe

I love facial hair on a man! But it has to be well kempt. I find the idea of a man taking the time and care to groom hot in a classic Mad Men way. Plus, properly taken care of, a beard can be so soft during kissing

Do you like when you go to go down on a gal and she has a forrest growing around and on her lady parts?  

Id assume some mongers do lol. But most of us dont. Im assuming it would be the same for the beard. Keep it groomed.

But I think they make us older gents look ancient.

there was a saying;   Work is like shaving; if you don't do it every day, you're a bum.

 
Even mass culture was on board with this, thus...