He made me Pee, Squirt or Something For The First Time!! What is this???

My Fiancé and I were having sex late last night for about an hour! I had 3 orgasms but once I started having the 3rd one I began to Pee all on him and the bed! He still hadn't ejaculated yet but my legs basically locked the whole rest of the time until he finished. I'm really confused as to why it took him so long to cum and why did I have 3 orgasms and pee??