"When you see Luis Suarez laughing as he kicks the ball over the line, he knows himself what's happened," said Marriott.
"Even Stewart Downing said to us 'I can't believe a professional official has missed that'.
"When you see that and it turns out to be the decisive goal, it's a sickener for everybody.
"But it happens. It's football, I don't think you can call him a cheat. I know a lot of people have done in the past.
"It's just a natural reaction sometimes for people to put their hand out.
"Every man, from a Sunday League football team to the Premier League is going to do that, and if it gives you an advantage and you can get away with it, then unfortunately that's football."