Manhog, I began wondering this topic myself! It was not long ago that I began taking finasteride, 1.25 mg EOD, I began 4days ago! What I noticed right away was I began LOOKING for these side effects, I've payed very close attention to my body these past days, however I've made a HUGE mistake by not having any real basis for comparison, since memory is greatly flawed.
Thus to me it is no surprise that you would find individuals trying to find symptoms to the drug and thus creating a self fulfilled prophecy, since the mind is VERY powerful.
One has to consider that as you get older your libido is going to drop whether you like it or not and whether you're on finasteride or not, it will still drop!
It really helps to read articles on finasteride, (check out regrowth.com they have some good articles) Many studies (not just merks) have found that side effects are low in comparison to a placebo group.
However because I'm a young lad and consider myself cheap but suave- I chose to do the finasteride EOD since I hear it's just as effective and takes the chances of "sides" away.
Good luck to you on your hunt, but remember with all the studies out there, there's only ONE way to find out if you'll actually get the sides haha. For me trying to make it as an actor, it's well worth the risk.