Okay I have a weird question. Basically I've been trying to reach completion as quickly as I can. Is that hurting myself in the future? Is there such thing as too fast?
There is no harm trying to reach orgasm quickly when your are masturbating. Many guys do so to reduce the odds of getting caught. While related, sex is not the same as masturbation. During sex with your wife, you will want to train yourself to last as long as possible without ejaculating. Learn how is not difficult, but it is something more appropriately discussed just before you get married.