I am not an expert on nutes, but there may be a benefit to atleast producing Semen in the same room as your plants. Every Activity envolving Ejaculation also produces massive ammounts of Carbon Dioxide. If I had a girlfriend I could trust I would definately be having sex with her during the light cycles of the flowering period, that would create alot of heavy breathing. I suppose Masterbation in a grow room may be beneficial.

As far as Nutes go? who knows, ask in the organic thread, someone asked a legit question about Menstral blood. It could be a legit to question if Semen is a good organic Fert.