Lol, yes that is very normal. he is a young man with his horomones racing. No you shouldnt tell him..that's just weird. have fun kids, just make sure to use a condom
Ha ha that's really funny
young guys have a lot of hormones going thought there systems especially thought puberty so that could be a factor if you want to tell him then you should but its up to you.
How exactly does he get a boner from you just stroking his neck... Watch next time you kiss him he'll ejaculate. Normal can be defined in many ways, what is normal is branded on us by the media.