i'm not a lesibain so i do enjoy the view of a good man every now and then but there are times when i wonder if the world would be a better place if there was only one gender. i normally wonder this most often when the boyfriend is being excessively male.... i mean the sterotypical slob and farting machine. i know not all males are like that. my dad certianly isn't and i've met males my own age that aren't like that (though curiously enough they were gay....hmm)
haha, anyway, i don't think your rats are going to care about not having girlie rats around. i have both genders where the boys are neutered and there is no difference in happiness levels with girls before they met to boys from after they met the boys. they were treated like any other rat when intros came. i don't think there was a difference in their mind about it at all.