Permeate

Within seconds, the virus spread. A microscopic view would have allowed him to see the tiny parasitic cells mingling with his own. Like two shy teenagers on a date, they circled each other, flirting, dancing, until finally one (the parasite) worked up the nerve to move in, to cop a feel. His cells were helpless against the lust of the virus.

But in truth, this was a good thing. This instant attraction was the goal. He would be paid handsomely for this matchmaking. Even if he would suffer as well.