[television89]

Background Info: Male 20 Years Old
100kg, 180cm Active, Eat healthily, play sports
7 sexual partners, only one in the last year. Usually protected.
Uncircumcised

Issue:
When my girlfriend goes down on me I get a tight feeling in my testicles and often feel that I am ejaculating within 15-30 seconds. However, my ejaculate is usually very watery, with a yellowish tinge. I also remain hard after ejaculating. The volume is not massive (i.e. nowhere near the amount I would normally urinate) however it still seems to be a bit more then when I normally ejaculate. I am then able to "cum" again after another 30-60 seconds of my girlfriend performing fellatio.
When masturbating however, even if it is only 5 minutes after my girlfriend bringing me to orgasm, my ejaculate is far more "normal". White, thicker consistency etc.
Am I somehow urinating?