Raves are noted for rampant drug use. The next line is If you need me, me and Neil will be hanging out with the Dream King Neil says hi, by the way. Neil is acknowledged in the liner notes of the album. The lyrics on page 10 are also from this song. Note the legal information at the end of the lettercol this issue.
Bonce is presumably slang for head.
Note Desire's change of clothing. It is not normally so unambiguous in its sexuality. The cells seems to resemble skin cells, I think. Not-wanting is a kind of wanting. Natural floaters are flakes of detached retina or the remains of a vein which fed parts of the eye during gestation and subsequently withered.