Mumbai, March. 9 -- Bollywood actor John Abraham said he completely believes in the subject of his film Vicky Donor, which talks about sperm donation.Shoojit Sircardirected Vicky Donor is Johns first film as a producer and the actor is leaving no stone unturned to promote it.During the first-look launch of the movie at Cinemax, John said: "I completely believe in sperm donation. It's a topic that needs to be addressed, needs to be spoken. There are 50 percent more childless couples so it's a topic that needs to be spoken."I would donate my sperm for a social cause. There are industrialists, police officers, people from army donating sperm because they want to keep their sperm aside because they are not sure whether they will be back from their battle. I would definitely do it," he added.