Hi, thank you for using health care magic. I can understand your concern. Semen is made up of sperms from testes and fluid from other secondary sex organ like seminal vesicle, prostate, epididymis etc. Many times this fluid ejaculate during arousal phase before the actual ejaculation. The transparent liquid type thing is which you are observing is the same fluid from secondary sexual organs. This is normal and can occur in any male. For premature ejaculation,there is technique called start -stop technique , and squeeze technique which can offer you more control over ejaculation. This will reduce the premature ejaculation over time. Medicine like sertraline , escitalopram are also useful in reducing premature ejaculation , this medicines are usally prescribed by psychiatrist for treatment of depression but for your condition they are also useful. For second time sex , sexual desire play a part. Many young male have second erection very easily. Use different position , role play, fantasy during second sexual activity which can increase desire in your part. Alternatively ask your partner to become more active which can help you get erection faster. As the desire goes down the second erection takes time. If you find it more troublesome and feel that this is something more , then I would suggest serum testosterone level testing. I would suggest you to consult psychiatrist for further help if needed. Psychiatrist can also help you out through behavioral therapy in your condition. I hope this will help you. Regards.