That's true. My solution is (when frequently doing it in the car) is to have my worn out dark blue t-shirt handy to cum onto directly, then wipe my dick right there so no mess. It's still wearable and I do after washing when I can't pull it apart. The stains remain despite that, yet people are clueless as to what they're seeing when I wear it in public. Over 100 ejaculations, dick wipes and counting!