Well it's a little obvious don't you think? Who else would be able to handle this absurd amount of semen? Also what would an average person do with it? Exactly. Only a person that craves the seed like we crave for oxygen would do it. Somebody that literally breaths fresh life (because of semen)
Do you have any reason (or alibi) why it should not be you?
Most probably some Lovecraftian horror story / character reference.