What was the pulsing in his.. area..?!

Its totaly normal. He got an erection. That means he likes you a lot ;) It occurs when they have sexual desire, but they usualy ignore it, hope it helps!

Don't be afraid.. It was his junior pulsing and knocking at your door and calling your name to open the door. It's chilly outside and in no time trembling to go past inside a warm habitation that you alone can provide but it was cut by you as you pulled him away, turned out to be only in his dreams through out the day when both of you had parted away.

Contractions happen during an erection.