Is... Is Spidey the western equivalent of a Harem Anime Protagonist?
But this just seems to be one of those things that happens when a character's been around long enough. If you look at past dating/kissing histories for people like Daredevil and Batman and you'll see similar patterns. Hell, Superman, who's been linked to Lois Lane for the majority of his career has a long list of conquests or at least people interested in him... and prior to the reboot, possibly a porn film starring him and another man's wife floating around somewhere. They were mind-controlled, but still!