Lol SSS - you sound like you reached those conclusion reading between the lines. Marilyn Manson "is not gay"! The women's been with (even married)can attest that: http://www.zimbio.com/Marilyn+Manson/dating - those are definitely not women you can keep at your side as a cover-up. Both officaly and unofficially Marilyn Manson - was never in a relationship with a man. He team-up for a music video: http://www.mtv.com/news/articles/1670077/shia-labeouf-marilyn-manson-born-villian-video.jhtml and became close friends after that (apparently - they're both fond of same type of weirdness). There's no proof of any romantic relationship between this two. That incident you're referring to - with the water: http://www.cleo.com.au/celebrity/celebrity-news/2011/8/shia-labeouf-freaks-out-spits-water-at-girlfriend-and-marilyn-manson/ proves that Shia LaBeouf - can loose his temper even in a public place:
"Shia picked up a water bottle and shot a mouthful of water all over his date's legs," a witness told US Life & Style magazine.
"Then he put more water in his mouth and started spitting it all over his tablemates, including Marilyn Manson."
Manson reportedly tried to calm the 25-year-old actor but he only became even more out of control.
"All of a sudden, Shia started shouting at his date and getting visibly angry," added the eyewitness.
LaBeouf apparently went to leave, and "lunged" through the crowded club. "They tried to hold him back, but he kept struggling through.
"Shia had to climb over people and tear himself out of the grasp of various strangers who were trying to keep him from going crazy," the source said.
His girlfriend Karolyn apparently chased after him and the couple weren't seen again.
"Marilyn looked shocked and annoyed, but stayed seated," the insider said.
"It was so insane — he just had a total meltdown right in front of everyone. It was completely out of control. He was so angry and physical."
From what's stated above - Shia's date - took the big hit, while Manson - got splashed indirectly - as he was spitting swatter all over the table on all people from his proximity. He just got more attention that the others - cause of who he is.