Do You have An Awful Golf Swing

I have been thinking a lot lately about fixing a bad golf swing. I play golf regularly with my father and he has a terrible swing action. He has swung in that manner ever since I can remember and I am sure that it is not only making him play quite badly, but may be damaging his back as well. I would really like to talk to him about it, but because he was the one that taught me to play, I hardly feel that it would be right coming from me. I was wondering whether the best thing might be to book him some professional lessons and give them to him as a gift.