"Romantic scenes get built up because they're something that's coming up. It seems like they're always looming and other people don't want to talk about them because somehow it's got this weird awkward perception.
"Once you get there, if it's with somebody you really trust, I thought that was one of the easiest days," he added. The film wasn't an easy one for Efron, who had to sweat it out in the gym to play the role of a soldier.
"There were striking differences between the way that they were and I was. I was able to look at that early on, and then physically, there was a lot to be done. The hardest part about this was the physical transformation," he said.