Anything that keeps the penis groged will help enlarge the penis: prolonged masturbation, prolonged sucking and bringing the penis to the edge of ejaculation, then lay off till the erge to cum passes, then let your lust crazed partner start sucking your sore penis again, bringing it to the edge as many times as possible. Sore dongs get bigger, it's like when you hit your thumb with a hammer, it swells up, well that is what happens to your penis in a prolonged edging routine, your penis is hurt from over use and swells up, plus your are getting an erection on top of that, so your penis gets bigger than it normally would. Plus the delicious sensuality of having your sore boated penis sucked for such a long time. Bring it on!