If this is true, then it is going to change the SMP completely:

http://www.inquisitr.com/2683442/goodbye-vasectomy-hello-sperm-switch-men-can-turn-fertility-on-and-off-with-new-sperm-switch-invention/

Excerpt from the site:

So how exactly does the sperm switch work? According to the German inventor Clemens Bimek, the sperm switch works by diverting the flow of sperm back to the man’s testicles when switched on. The device is slated to be just as effective as a vasectomy without being permanent. If the user decided they would like to become fertile again, the man can simply switch the device off via a switch in the scrotum, and the sperm would again be allowed to be ejaculated.

If this happens, this is going to completely change the Sexual Market place. No more bitches trying to cheat men off by saying they are on the pills. No more child support payments. No more pain associated with vasectomy. Most of all, guys will be fucking girls, and women are going to have to adapt before they reel in beta bucks. Though not all betas are going to change themselves, there will be a significant impact upon SMP for sure.