Are you for real, brother? Why would you even wanna share Hermie with that cock-blocking schmuck, when he utterly refuses to let you catch a single glimpse of those two legendary Slytherin pum-pum girls?
Don't get me wrong, a DP scene with the GriffinWhore girl would be nice, but not with Snape. Tonks with a strapon (or futa transformation, for those who like that stuff) would be a fairer (and much more interesting) idea, yeah?
Hell, I'd rather call Filch, than let Snape slither his nether viper into my Hermie. Snape not sharing? Me not Caring.