I certainly agree with the common thread that sex is fine (boring, but fine) without the spices of BDSM...
To answer this second question, though...I'll say that I never had an orgasm until I began exploring BDSM (which isn't when I began having sexual adventures). I may add, though, that that isn't conclusive given the people that I was with and the situations in which....you get the idea.
But BDSM is one of those excellent things that really ups the ante in all sensations that I feel, hence my great joy with it + sex....