Why not? Sometimes, you're pressed for time and just need to get it out. It's also a way to TOFTT to test the waters, for a smaller initial outlay.
Of course, there are many times where a longer session might be preferred or wanted, but one can potentially do many things in a short amount of time. I bet if any guy REALLY wanted to, it would only take them like a minute or two to get over the finish line, lol