Is daring your crush to give you a piggyback ride a good flirty move?

some details about us:
- we flirt over facebook messenger sometimes
- in person, the only time we really get to talk is our chemistry lesson, where he sits behind me
- i'm pretty sure he knows i like him, and his behaviour towards me is promising that he's interested too.

the only problem is that i've never really touched him before, except for the odd accidental shoulder brush, and we're not like close friends, just acquaintances from school, so i want to break the touch barrier.
Is daring your crush to give you a piggyback ride a good flirty move?
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