Why does he want me to text him first?

Alright so my friends told this guy that I think he's hot. He was in my best friends 3rd hour and I went into that class today and when ever I would look at him he would stare for a couple seconds then look away. Anyways after school in the parking lot they told him I think he's hot and he gave them his number to give to me. I guess tehy tried giving him my number first but he insisted on me having his number and texting him first... why?
Why does he want me to text him first?
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