Google doesn't give much answers on the nutritional value of semen other than some gag sites and aphrodisiac supplements. What I was wondering is any potential benefits of regularly ingesting semen? All I could find was a wiki article explaining potential health benefits:
"Antidepressant: One study suggested that vaginal absorption of semen could act as an antidepressant; the study compared two groups of women, one of which used condoms and the other did not.[13][14]
Cancer prevention: Studies suggested that seminal plasma might reduce breast cancer by "not less than 50 percent."[15][16] This effect is attributed to its glycoprotein and selenium content, with apoptosis being induced by TGF-Beta. A related urban legend parodied these findings and claimed that performing fellatio at least three times a week reduced the risk of breast cancer.[17]
Preeclampsia prevention: It has been hypothesized that substances in semen condition a mother's immune system to accept the "foreign" proteins found in sperm as well as the resulting fetus and placenta, keeping blood pressure low and thereby reducing the risk of preeclampsia. A study shows that oral sex and swallowing sperm may help make a woman's pregnancy safer and more successful, because she is absorbing her partner's antigens.[18]"
https://en.wikipedia.org/wiki/Semen
One may argue that ingesting your own semen only slightly replenishes lost nutrients. What if one were to harvest this from animals? A dog can literally put out over a cup worth of semen per session, much more than a mere tablespoon which humans are capable of.
One interesting note is that taurine, the main component of energy drinks, was originally extracted from red bulls. It is now synthetically made to prevent any scandals...
http://voices.yahoo.com/energy-drink...es-330934.html