No it doesn't mean that one isn't enough. It means that one wishes to try new things, broaden horizons and to experience all avenues of pleasure.

If you do it set some boundaries. Make your feelings known. If he steps over the line you have your answer. If he can't listen to you then fuck him.

__________________
Deep into that darkness peering,
long I stood there, wondering, fearing,
Doubting, dreaming dreams
no mortal ever dreamed before.