Friends Getting Friendly

He had touched and felt my crotch when we fooled around wrestling, I didn’t say anything until he really got a good feel. Then I said “that’s making me hard.” He then pressed his against me and started dry humping a little. We were quickly removing out jeans and his dick really surprised me, it was a lot thicker and longer than mine. He chuckled some as we held them together comparing and stroking. It was so impressive, I could wrap both my hands around his and the more than just the head stuck out. I stroked him a bit like this and as a drop of precum formed on his dick I decided to taste it and licked the head of his dick. Then I kept licking on his glan. He was quiet but squirming and very reactive to my tongue. I slowly started taking him in and in seconds he was exploding in my mouth. It was as exciting as my first fuck with my girlfriend which I was thinking about and wondering what she would think about his bigger dick, would she enjoy him more? Why do I get hard now thinking of her fucking him?