Athos, I'm 38 and never used to be a big distance squirter. I started doing some research and found some of the best supplements over time that really made a difference for me. I started with a calcium/magnesium/zinc tablet and selenium. These all work together for the natural production of testosterone production in the body. I added 3 x 1000mg capsules of lecithin. This really made a big difference and really helped with the volume. If you can manage a little stimulation, without ejaculation, approx 1 hour before you have sex, it seems to really increase the volume and intensity of the orgasm. It's almost like a warm up before you exercise. Make sure you stay well hydrated. Time between ejaculations is a huge factor also.
I've tried several of the "volume" pills and have found a couple that workeed for me. Magna RX (which I just saw the other day is now being sold at Wal-Mart) worked pretty good for price - $25. The best I found was a pill called Xplosion. It's about $40 bucks for a bottle. That stuff gave me some huge volume and some huge distance, both being better than when I was in my 20's. I would only take it for a couple of days in a row before I knew I was going to have a hot date night with the wife. Their directions say the more consistent you take it, the more improvement you can expect. I'm not sure how much I believe that due to the need to cycle anything that has messes with your hormones. I used to get it at a local adult book store, but they don't carry it any more, so I tried another brand and it seems to work ok. I can't remember what it's called, but I think they all have pretty close to the same ingredients; ie. maca, horny goat weed, tribulus, yohimbine (I don't care for this stuff), arginine, and a few others. I think the key is to find the one that works best for you.
One last little thing, I've seen ��������� do this. Right at the point of ejaculation, squeeze the uretha at the base of the glans just for a brief moment in time to build a little pressure. Concentrate on giving a forceful kegal, and release when you feel the pressuremoving up to the tip. Just make sure your not pointing at anything not cum proof...like your wife's eye! lol