porn gives bad idea about how to fuck

I just have to laugh at all the guys who learned fucking from porn.  They think they have to push their cock in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, push it in, pull it back, but really just pushing it in once will work fine.

once?