As a person with a twin, I absolutely understand sibling shenanigans even though we haven't partaken much. I think doting happens when there's a distinct attitude difference and a sort of hierarchy, usually age-related. However, when a pair of siblings is roughly equal and uninhibited with each other, they create a feedback loop with potentially weird results.
Yeah that's probably the case as they are 7 and 10 years older than me respectively... the most shenanigans I remember is being forced to be a hug pillow for my sister aka the eldest... Though it isn't like I hated snuggling-nya.
It happens, well. Between brothers that is, can't say for sisters or if you have a sister. Though growing up, my brother and I. Our shenanigans were something alright, but we were good to each other mostly.
My other two brothers now, not so much. In actuality, it kinda just depends.