I don't know which genius at #Google thought it was a good idea that swiping the right side of the screen on #Android goes 'Back'
It's so sensitive that I accidently go back several times a day. What's the gesture to go forward? Who knows?!
You can disable swiping actions, but that disables everything and swiping from the left of the screen to go back is actually useful (and the same as iPhone) and never accidentally triggered.