32 year old guy with very high sex drive - problem?

I have always had a high sex drive and have a very short refractory period.  I am fit, toned, and very lean but not bulky.  I just just wiry and strong for a relatively skinny guy with very little body fat.  I also eat very well for most guys including whole grains, veggies, and lean meats/fish/poultry.

I pretty much need to release sexually at least twice, usually three times per day, otherwise I will feel pressure and pain in my male parts.  I do it once in the morning, once when I get home in the afternoon, and once before bed.  My semen is always cloudy and thick except when I have sex marathons and then is thins out and becomes clear.  If I don't release, pre-*** will just start dripping out of me.  I can have sex 5-6 times per day without feeling tired or worn out.  This is sustainable indefinitely as long as I eat/sleep well.  I have done sessions of 10-20 times per day and that leaves me worn out.  I also have a very short refractory period and sometimes don't even go completely soft between sessions.  My GFs tell me that my erection is harder than most guys, which I have read indicates good circulation.  This makes sense as I am an active guy.

My GF thinks that I sometimes have a one track mind.  She pleasures me but feels I might have some type of imbalance and that this might have long term problems.  She is worried about mineral depletion so I have started taking 25mg of zinc 3-4 times per week.  If anything, this has just made me hornier.

Is there anything wrong with me?  I thought most guys had a high drive but I am finding out that I am definitely on the high side of things.    Is this excessive and is it a sign of any problems?  I have been this way since I went through puberty.  People talk about teen guys getting an erection over nothing and that is how I am at 32.  I have lots of energy and am healthy overall so is this normal for a fit guy?  I understand that lots of guys start having ED problems in their 20's nowadays with everyone being overweight and such.  One GF indicated that she dated a guy who could only do the deed about once per week and he struggled to get it up even then.  I would be foaming at the mouth if I could only release once per week.

I think she is also worried about me cheating due to this drive but I have never done this before.  I am fine with taking care of myself when needed.

Although I have never had my testosterone levels measured, I have many symptoms of high levels.  My drive is steady and not variable so I am assuming this is fine but wanted to check.  I feel lucky to be this way but it can get annoying at work, etc.