Yes. They do.
> There’s always the potential for a mixed signal.
That's also true in same sex friendships; bisexuality and homosexuality do actually exist.
The solution to this is communication, not avoiding friendships.
> My wife would never allow me to hang out with another woman solo
I'm sorry your wife doesn't trust you, and I'm glad that neither my wife nor I have that problem with each other.
> unless it was someone’s wife
If them being someone's wife negates any risk, than surely you being someone's husband should, too?
Yes. They do.
> There’s always the potential for a mixed signal.
That's also true in same sex friendships; bisexuality and homosexuality do actually exist.
The solution to this is communication, not avoiding friendships.
> My wife would never allow me to hang out with another woman solo
I'm sorry your wife doesn't trust you, and I'm glad that neither my wife nor I have that problem with each other.
> unless it was someone’s wife
If them being someone's wife negates any risk, than surely you being someone's husband should, too?