Sure. Although I think it's worth distinguishing among different sorts of fun, here.

There is the fun that comes from not having other people infer things about me that aren't true from my body, for example.

There is the fun that comes from having people infer things about me that aren't true.

There is the fun that comes from novelty.

There is the fun that comes from pleasure -- that is, if my new body can experience more pleasure than my old one, that might be fun even when it isn't novel.

There are many others.

I'm not sure it makes sense to lump all of these together.

(Caveat: I am talking about colloquial fun here, not Fun. I don't know that they're different in this case, I'm just not really considering the latter at all.)