I'm in that same catagory as "U". Mid 20s guy that has multiple orgasms which include ejaculation. Each orgasm takes longer than the last to achive but I don't lose the erection until the 3rd or 4th or I just stop for 3-5min.
Unfortunately, I rarely get to use my 'talent'. Almost all of my spare time I spend as a Biology egghead and in general academics but you'd never know it by looking at me.