I mentioned above that i have them all the time - but they usually subside soon after I wake up, or when I get out of bed. However, this morning I waited in bed for about 10 minutes before getting up, still fully hard - and it took another 20 minutes before I was flaccid again. Admittedly, I was enjoying the moment, but I still had to wait to use the toilet - it's hard to do with an upward-pointing erection!