Is it normal it turned me on so much

Today me and my best friend, both girls, teenagers, were messing around being silly saying some silly dirty things as a joke, once i was lay down and wouldnt move so she sat on my, downstairs shall we call it, and bounced up and down saying move anddd stuff, this really turned me on and i was nearly moaning, even though she didnt mean it like that , i think, then we did this random thing where i carried her and the fact that her legs were wrapped around me and she was grabbing onto my arse when i nearly, accidentally;) tipped her off felt so good, is this normal, is it normal i wanted to lick her out? Thanks