My understanding from previous posts is that you are supposed to wear your initial hoop or studs for a number of weeks -- the figure "six month" is what I recall from some posting. That doesn't mean you have to wear them all the time, but the closer you get to "take them off just before seeing the friends and put them back on right after", the better, I understand. I did read of one person who took their studs off while at work, but that is not recommended. If you pierce, you should be prepared to have people at work notice.
I'm considering getting mine pierced tomorrow (January 2). I worry a bit about what I'll say at work, but I would not be the only guy at work with pierced ears. I'm not sure if any of the guys will say anything -- it isn't a tough crowd, but it would be news and people probably wouldn't ignore it fore-ever. I might get a bit of ribbing one coffee-break, but I think it would be pretty much a non-issue after that provided I don't wear earrings that are too femme while at work. I expect, actually, that more women would comment on them. The tough part of that is that most of the women that I think might comment, are women that I think would be more or less accepting of my cross-dressing, leading to the tough part of not telling them much of the truth when they ask (I don't have trouble telling "strangers" that it's none of their business, but I don't like misleading "more or less friends".)
By now I must have a reputation at work for dressing a bit unusually: only a few people at work wear suits, so it's not that, but I'm one of the few who wear "interesting" clothes (not "snappy" or "fashionable", but I have, for example, worn a number of female tops, getting away with them with the principle of "If it's a guy wearing it, then I guess it must be a men's shirt that I just haven't seen sold anywhere." I'm the local non-conformist, I guess -- but being a known non-conformist is a bit different than being a known cross-dresser!
(Now, have I convince myself yet to to ahead with the ears?)