What do thigh slaps mean?

Anonymous
There's this guy who I sit next to in one of my classes and he slaps my inner thighs and laughs. Last Friday I said I was going ice skating and he said he would come too. We were sitting with our friends and with my legs open and he made his friends all look while he slapped my inner thighs. He was slapping my inner thigh and kinda high. I'm not sure why he keeps doing this, is he interested?
What do thigh slaps mean?
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