HAPPY B-DAY!!
I've wondered the same thing myself about the way many JW's wish happy b-days.
I'm DA'ed myself and it seems like every couple years my mom will call me up on my b-day.
She says this everytime- "So,...how does it feel to be (insert age)?!"
It irritates me so much. It's like your acknowledging my b-day,...so what the heck is the difference between saying that and saying "happy b-day".
I think it's so irritating, because when she says, "So,...how does it feel to be (insert age)?!", to me, it just brings the mind control that she is under to the fore front of my mind.