[aristeides]

If that's the explanation, isn't it odd that they seem to expect men to behave like women?

[bvw]

Puuting on my social-anthropologist hat: That could be because the male-female cues of real life are missing on-line.

[cyncooper]

If that's the explanation, isn't it odd that they seem to expect men to behave like women?

Since your premise is in error, you can discard your conclusion.