Make sure the pre-cum is flowing
I've done 120 cum-on-pics videos, always working to get long spurts, and in my experience, the important factors are:
1. Drink lots of water ALL DAY before the shoot.
2. No caffeine. (I'm sorry but it's true -- it prevents hydration).
3. Get your PRE-CUM flowing!
This was super-important! If your tube is lubricated with pre-cum, the cum shoots out, but if it's dry, the cum goes slow, and the first spurt basically acts as the lubrication.
Some new (and some correlating) advice found online
" While there is a lack of supporting scientific evidence, a number of ingredients are said to help thicken up semen. Because of their protein content, egg whites and gelatin are often recommended. Wheat germ, omega-3 oils, selenium, and zinc are all also believed to improve consistency.
(Butter's note: Tomato-based products, soy-based products, oatmeal, and celery have also proven to help thicken the load, at least in my case!)
Vitamin C, vitamin E, zinc, and essential fatty acids are found in the prostate in high levels, and are all necessary to produce semen. Low zinc levels have been connected to decreased production of seminal fluids, as well as lower testosterone levels. A healthy balance of nutrients is important for maintaining vascular health as well, which improves your ability to achieve and maintain erections. There isn't a need to go popping extra vitamins if you are already eating a diet rich in nutrients, particulary from fruits and vegetables. Essential fatty acids are found in certain kinds of fish (like salmon) and nuts.
Celery is one of food products known to have great properties for sexual stimulation. It contains androsterone, an odor free hormone which is very inviting for women. Raw celery is the best way to increase that desire.
Oysters are rich in zinc and are know to increase sperm and testosterone production. It contains dopamine which increases the sexual desire.
Bananas, Avocado and Almond or other nuts are some of the other food products which help in this matter."