What was this tingling feeling?

I was out with my friend today and we are really close.When I was saying goodbye he gestured for a hug so I hugged him,but it wasn't a normal hug he was pressing his body against mine in a circle motion,which then I held him tight on the arms with my nails digging in and I pulled away and he gasped.He then smiled and I turned to leave.During that time I had a tingling feeling in my vagina.What was it?