Pilus is what one bacterium uses to copulate with another. The aroused touch, in contact with its partner, will incite conjugation,allowing a mixing of fluids & exchange of instruction.
Perithecium is one of several types of fruiting bodies of the phylum Ascomycota. Conjugation is facilitated by the ostiole, a small pore atop the amphora-shaped sac of burgeoning spores.
Like the ant, philosopher & funnel weaver, they benefit from desires that get realized in the presence of pores.
"Love life more than the meaning of it?"
"Certainly, love it, regardless of logic as you say, it must be regardless of logic and its only then one will understand the meaning of it. I have thought so long a time. Half your work is done, Ivan, you love life, now you've only to try to do the second half and you are saved."
"You are trying to save me, but perhaps I am not lost! And what does your second half mean?"
"Why, one has to raise up your dead, who perhaps have not died after all."
THE BROTHERS KARAMAZOV
Translated by Constance Garnett