Semen degradation

Hi there,

I was wondering what happens to left over semen after coitus once the rest of the semen is drained away through gravity? I ask this from a molecular point of view.

Is the remaining semen re-absorbed into the female body and recycled or is it destroyed completly by enzymes and macrophages and excreted out of the body as a foreign substance? What kind of macrophages and enzymes are used in the degradation process?

What happens to the DNA of the sperm when it is unsuccessful in fertilization?

Thanks in advance!