I like to start with a very slow penetration introducing only the glans and slowing withdrawing. The withdraw does leave the very tip inserted. Then slowly insert just a bit more. This is continued until full length in inserted. Then slowly increase piston like action. After about 10 strokes speed up very rapidly for about 5 strokes. This process is repeated until right at the edge. Then holding at full penetration while doing Kegels for a short period while things cool a bit. Then the whole process is repeated. I like to do this for 20 minutes or longer. If my partner climaxes during this, the speed of piston action increased extremely to stimulate their climax to the maximum. Sometimes I climax simultaneously, sometimes not. If my partner so desires, once I reach a certain point the extreme desire to climax subsides and I am capable of rapid, deep penetration piston action for quite some time.