Now what am I dong here I wonder? Oh that's right, I'm practising for a real cock.
Get your dildo, and do the same. Follow this little example by me. Go from 7min30, to the end of the blowjob.
http://www.xvideos.com/video5017681/busty_isis_love_pornstar_heels_oral_suck_lick_blowjob_cum_cumshot_cum_shot_jizz_sex_fuck_facial_sw
For every second that you are not following her exactly, it's a spank on each cheek.