No real choice

Peter was just about to have MJ, when he heard sirens. With a sigh, Peter once again put on his webs so that he could help people.

It didn't take long to see what the problem was. A bunch of mutants had formed a rally to promote tolerance and it had turned into a riot when the Friends of Humanity arived. The X-men were already on the scene but Peter stayed and helped where he could.

What Peter didn't know was that his new symbiot was assessing the mutants. Here was a strain of humanity that was already superpowered and who's women were very sexy (presumably to promote breeding). It determined that, with a few modifications to the X-gene, the primary host could have an entire race of sexy females.

Every time that the symbiot passed to a mutant woman it immedatily made her three times more fertile so there would be more mutant babies in the future. The secondary also had instructions to activate the X-gene in any human it came into contact with.

At the end of the conflict, Peter had many more lovers that would soon seek him out.