Conspiracy? Ethical? Hmmmm, did a lab in England actually produce a male sperm from embryonic stem cells?  And if they did, is this right?  I guess they were moving forward with a previous study they did with mice, that supposedly produced offspring, BUT, none of the offspring actually survived...so the logical idea would be to move into a human model ASAP!  Love this post http://turekonmenshealth.com/?p=208, it is a urologist from San Francisco that is trying to grow a functioning testicle from stem cells.

Conclusion:

Conclusion: Tetrandrine, the main active ingredient in the Chinese herb Fen Fang Ji (the safe Fang Ji), has shown to relax penis muscles for enhanced blood flow to erectile tissue. It's mode of action is through Ca channel blocking, not nitric oxide pathways (which is the mechanism of viagra).

Conclusion: Cnidium Monnieri (Shi Chuang Zi) naturally increases nitric oxide release, which powerfully increases the production of cGMP. Cyclic Guanosine Monophosphate (cGMP) is the key in obtaining and sustaining a powerful erection. cGMP relaxes the muscles around the penis, which makes it possible for the cells in the penis to take in blood, thus allows you to experience a proper erection.

In Fertility & Sterility, March 2009, a study was published that concluded, "frequent intake of foods like milk may negatively affect semen quality in humans, whereas  fruits or vegetables may IMPROVE semen quality".