What is the difference between "friendship kiss" and a normal kiss?

When I say friendship kiss I mean this
When I say friendship kiss I mean this
Is it because of the strong bond they have between each other or the amount of trust the have? Some people interpret this as they're in a relationship (while in reality they're not). Had you ever done this with the opposite gender (without being friends with benefits). Do they do this for fun? I'm fine with this but never knew where does this stands in the terms of friendship. Please Explain
What is the difference between "friendship kiss" and a normal kiss?
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