A sperm is a single cell, so there is one cell per sperm.
The word sperm has one syllable.
One egg, one sperm.
One because the sperm is one cell and the egg is one cell
One.
one
one
If by "load" you mean ejaculate then Yes, it is fine, you can't run out or over use your penis.
There is one syllable.
Only one.
one
one tractor trally load how many cubic meters