what physical. changes will have to my penis after first sex .iam circumsized .and 2) any pains for me during sex?

hey iam actually a new user here and also i dont have much knowledge about sex ..and i have a girlfriend we both are in high School and i wanna have sex with her we have the sex knowledge 0% ...can u plz help for all the newbies for safety before sex to avoid all these pregnancies and etc i dont kno...

i got a pimple near my pennis how to get rid of my pennies ....

thanks

i cannot control myself from masturbate some times i got a habbit of it

my age is 16 and iam realy sex aggressive. i do hand job daily i want to control myself i got addicted to it give any solution to control this. do any thing happen to me if i hand job means do i get weaker.plz help me