Slang terminology for marijuana. Another slang term for marijuana is "Mary Jane". In the Spiderman mythology Peter Parker (Spiderman) is infatuated with a woman by the name of "Mary Jane". The actual term relating to marijuana "Mary Jane" has become widely recognized as marijuana thus "Spiderman's lover" is a form of evolution as no authoritative figure will have any clue who in the fuck Spiderman's lover is.
"Did you get a piece of Spiderman's lover last night? She was high quality stuff."
"That Spiderman sure has it made, his lover makes me feel fantastic."