I want to know if swallowing sperm makes you fat. I heard that it is 100% protien and 50 calories per squirt, is that true? - asked by DNAT 
posted it before..
No. But before we talk calories, let's clear up the difference between sperm and semen. Semen — also known as ejaculate — is the fluid containing sperm that is ejaculated during sexual excitement. It is composed of seminal fluid from the seminal vesicles, fluid from the prostate, fluid from the Cowper's gland, and sperm. Sperm move from the testicles to the seminal vesicles through tubes called the vas deferens. In the seminal vesicles, they mix with other fluids to form semen.
A tablespoon of semen contains approximately six calories. Semen does contain protein, but it also contains all kinds of chemicals and minerals, including water, sugar, calcium, chlorine, magnesium, nitrogen, vitamin B12, and zinc. But it does not contain enough of any of these things to be considered "nutritious."