BlazeF,
I definitely have a very high sex drive ("hands up") and can certainly relate to the need to masturbate every day and/or have sexual relations. I wouldn't say that I do it 15 times daily, but I typically could have some sort of sex, either one my own or with a partner, about 4 to 5 times daily for most days.
I agree with others in the forum that your situation is not a problem unless it is affecting your life and your lifestyle. Stroking away at yourself at work can be a risky business as getting caught there could be disasterous or at least embarassing. As for your parner you need to be careful not to alienate him (and this is difficult if your sex urges are extreme).
Have you considered discussing this with a sex therapist or perhaps looked into sex addicts anonymous? I'm not implying that you are addicted, but these avenues may provide you with someone who can discuss this with you.
Certainly I am always here to discuss your situation and if you need more privacy to discuss particular details, feel free to private message me. We are here to help each other.
Wendy