A guy can wear a condom if your worried about stds or if a girl wants something flavored or doesn't want to swallow.

Thanks for the reply.

So it's not as important as when having actual intercourse?

It is as important if your worried about stds.
If you with someone that has been tested and doesn't have any, then its ok not to use one. I don't personally use them when giving my bf oral but I know he doesn't have any stds.