[@Saarebas][@CAS1006] Yeah, it was a tad bit confusing on how the process actually worked when I was reading up on it since the whole explanation is ever so said here and there. As [@Genni] stated, yes that is one way they'd infect a person, mainly their female counter part, but I thought up of a way for it to workout for Karras. As [@Genni] stated, yes that is the way they'd infect a female counter part.

Probably should've put this up  earlier as well, but I took the liberty of taking the concept from the series of Starcraft as to the way [url=http://starcraft.wikia.com/wiki/Terran]Terrans[/url] get infected by [url=http://starcraft.wikia.com/wiki/Broodmother]Brood Mothers[/url] or [url=http://starcraft.wikia.com/wiki/Queen_%28StarCraft_II%29]Queens[/url] to which they then turn them into [url=http://starcraft.wikia.com/wiki/Infested_terran]Infected Terran[/url]. 

But if this concept doesn't doesn't work, I can simply rework it out with no problem.