[Andy]

You have to be careful of the amounts of estrogenic compounds that you consume. It is possible to maintain the ability for erection while taking some form of NBE, including HRT. Otherwise the ladyboy/tranny porn industry would go out of buisnes. Though I do believe, it is a difficult line to walk. I would suggest doing a search in the mens section of the old archived site. I remember seeing several threads there on this subject.