Since sperm has protein, calories and water in it, could one hypothetically survive off of it

Say if their stranded somewhere with out food or water.

I actually looked this up online. The average calorie count is about 5 calories per ejaculation.

So you would need to find about 360 sources in a day to just have 1800 calories alone...(the average amount of calories for a male is 2400)

You would also be lacking in many Vitamins and Minerals. However you would have enough Zinc according to one article I read.

There are definitely a lot of nutritious things in it but I don't think it's sufficient for survival. There are many vitamins I don't think it has, and I know you can get scurvy from lack of vitamin c. If a person were stranded for a short period of time I think it would help them survive for a while, but eventually I think they'd have to eat the person they're obtaining it from.

If you were stranded without food or water, how could you possibly survive by regularly consuming portions of yourself? If semen were as nutritious as steak potatoes salad and red wine, you'd still die.

Semen has very few calories and virtually no protein, so it would not make a good food source, no.

Uh, no. Especially not if it was their own semen (which i think you mean rather than sperm)