Well, because it takes some effort for penetration due to his girth, there is a few minutes of wiggling and pushing in and out the head before i can take the base girth, i have been known to start shuttering in sheer delight during this process when he's got me begging for him. At the right angle the g-spot can be tickled without much depth for me so that whole penetration game we play can work in my favor as well.
Not to mention he's been known to almost spudder out of control during this process, although as we get older he's able to gain control and keep up the good work.