Dr.Crisler, considered one of the leaders of HRT for men, did an episode about it on Superhuman Radio which you can listen to here:
http://www.***************.com/shr-9...r-hormone.html
He considers it safe, and he recommends it be administered in the form of a topical solution you rub on. I seem to remember him saying something like "unlike Test, which you need to concern yourself with accidentally transferring to your wife, pregnenolone is safe" and wouldn't harm your significant other.
Well I hope he is right. I have learned not to put my faith in one doctor, no matter how knowledgable he seems.
Unlike Crisler, I believe the vets here say take it in a pill.
EDIT: My link has been censored, but it is SHR Ep #939 if you google...