fantasy about sex with a big muscleman?

No, but people I've known have.

They usually have really small cocks, caused by the steroids, and also tend to be somewhat self-obsessed, whacko even.

Not all big muscle men need steorids.. Anyway in my dreams these guys dont just have very big muscles but also very big down there

Well, if it's taking place in your dreams the guy's cock can be as big as you like. I am curious - what was your reason for starting this thread?

to find out if anybody else have these fantasies

A very respectable middle aged lady where I work told me she always watches Rugby football matches that are shown on TV, and I said "Are you into sports?" She answered, "No, but I love their muscly thighs!"

I'm just lurking until some woman comes along who fantasises about more mature guys with beer guts.

Your cards say your king will wear a fine coat.

I know that this doesn't really have anything to do with your question, but my wife of 13 years just had an online affair using Skype. She says that they never used the cam just the call feature and that it was fulfilling her fantasy's. Do you think that this was ok, or was it cheating?