Fungal joke

[charles mccarthy]

In <4e82b2$ifl at lyra.csx.cam.ac.uk> rnw1001 at cus.cam.ac.uk (R.N.
Weinstein) writes: 
>
>O.K., here is my one fungal joke:
>
>"Did you hear about the fungus and the alga?
>
>       .....they took a lichen to each other."
>
>Surely, though, this could be modified into a longer form???

Yeah, I knew an alga once who tried to make a go of it with a fungus.
But, alas, in the end she found out he was just another parasite...