Master's in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9359863878/9604715783. Other Useful info. • For the male: A slight incline of the penis to the side is average. The hardness of the penis tends to decline with age. Erection takes longer, and ejaculatory response is delayed. The size of the penis is variable. Since only the lower third of the vagina is sensitive, the size of the penis is not essential for satisfying the female partner. Semen tends to become thinner and yellowish with advancing age. Bloody semen may be due to inflammation of the prostate or seminal vesicles.  • Pre- ejaculatory fluid is the fluid that oozes out from the urethral meatus following an erection or before ejaculation. It contains a few sperms.