I don't usually produce large loads, but it does sometimes happen. Most of the time these things are just dumb luck, and there's not much you can do to control it. But there are a few things you can try that might increase the possibility of producing large loads, if you're willing to put the effort in.
As someone else mentioned, if you bring yourself to the edge of orgasm several times first before actually letting yourself cum, that will often produce a larger load. Also, if you're just very, very turned on and having particularly fantastic sex, that could do it.
I also find that drinking lots of water before and during sex seems to result in bigger loads, although you may have to take breaks to pee, which can be a nuisance.
You mentioned that you had had sex with her a few times already. Sometimes I find that if I have sex several times in a single day, my 3rd load is actually bigger than my 1st or 2nd...but only if there's a recuperation period of at least a couple of hours between orgasms. My theory is that if you've had a couple of orgasms in one day, the prostate goes into overdrive to replenish the fluids.
I've read that taking zinc and l-arginine supplements can improve the quantity of ejaculate you produce. I've experimented with this and had inconsistent results, but sometimes it seems to work. I'm not sure what does of zinc is considered best for this. For l-arginine, I take 500 mg daily, and an extra 500 mg dose about an hour before having sex. I notice a change in the consistency of my semen more than I do in the volume, though the volume does seem a *bit* larger, too.
Eating lots of celery is also rumored to increase the quantity of ejaculate. I haven't tested it scientifically, but I think it might work, and it couldn't hurt.
Exercise, particularly weight lifting, increases your testosterone levels, so that could help.
In general, taking good care of your health should help. Get plenty of sleep, drink lots of water, drink lots of fruits and vegetables, and avoid alcohol. I'm not sure if smoking would have an effect, but obviously in terms of your overall health it's better not to smoke. If you expect a night of romance, I'd opt for chicken or fish for dinner rather than red meat, and I'd avoid fried foods or heavy foods.
As someone else mentioned, if you bring yourself to the edge of orgasm several times first before actually letting yourself cum, that will often produce a larger load. Also, if you're just very, very turned on and having particularly fantastic sex, that could do it.
I also find that drinking lots of water before and during sex seems to result in bigger loads, although you may have to take breaks to pee, which can be a nuisance.
You mentioned that you had had sex with her a few times already. Sometimes I find that if I have sex several times in a single day, my 3rd load is actually bigger than my 1st or 2nd...but only if there's a recuperation period of at least a couple of hours between orgasms. My theory is that if you've had a couple of orgasms in one day, the prostate goes into overdrive to replenish the fluids.
I've read that taking zinc and l-arginine supplements can improve the quantity of ejaculate you produce. I've experimented with this and had inconsistent results, but sometimes it seems to work. I'm not sure what does of zinc is considered best for this. For l-arginine, I take 500 mg daily, and an extra 500 mg dose about an hour before having sex. I notice a change in the consistency of my semen more than I do in the volume, though the volume does seem a *bit* larger, too.
Eating lots of celery is also rumored to increase the quantity of ejaculate. I haven't tested it scientifically, but I think it might work, and it couldn't hurt.
Exercise, particularly weight lifting, increases your testosterone levels, so that could help.
In general, taking good care of your health should help. Get plenty of sleep, drink lots of water, drink lots of fruits and vegetables, and avoid alcohol. I'm not sure if smoking would have an effect, but obviously in terms of your overall health it's better not to smoke. If you expect a night of romance, I'd opt for chicken or fish for dinner rather than red meat, and I'd avoid fried foods or heavy foods.