A waitress waits my waiting dad

I can’t believe I’ve never noticed this before, BUT when I was out to dinner with my family our waitress was just so great. She was so nice… to my dad. She was so polite… to my dad. She was just over the top… to my dad. At the end of our dinner the waitress brought the check around and as my mom lifted her hand from under the table, the waitress made a b-line straight for my dad’s hand and gave him the check. I couldn’t believe it and I’m almost positive this has happened more than once, but now I notice it all the time and I see it at other tables as well. I wonder if it’s the same with a male waiter.