It's funny because as far as Peter's sex life goes, there are two phases, Pre-OMD and Post-OMD.
Pre-OMD
-- Peter definitely slept with Mary Jane, then Felicia, and of course he married MJ.
-- Gwen Stacy is ambiguous because there's reasons to go either way.
-- There's also the episode with Betty Brant after he broke up with MJ which editorially, didn't lead to an affair because Peter officially cannot be party to adultery.
Post-OMD
-- Peter slept with Felicia again as a "booty-call".
-- Peter had a one night stand with that Michelle girl.
-- Peter slept with Carlie Cooper.
-- The Chinese scientist Lian Tang.
-- Silk via pheromones.
-- Mockingbird.
It's really weird how much more of a ladies' man Peter has been since OMD than he was before it. It's weird that Marvel editorial justified removing the marriage for reasons of "making Spider-Man relatable and single" and yet they make him even less so...and a serial dater in fact.