Theres an ancient trick to getting every (or most) of the peepee out after finishing. Put two fingers behind your balls on that hard middle ridge, closer to the sack than the gootch proper, and apply pressure to it. And/or gently but firmly massage it upwards. Gets the last juice droplets out. This was invented by those old arab philosophers in ancient bagdhad or whatever. They knew about math and piss. I teach this technique to strangers at urinals all the time and they always thank me