Did you seriously call sirens sultry? Assuming they're human, they're probably cannibals. They use their "hot hypnotic powers" to lure sailors in to their deaths! Why else would they do that if they weren't planning to eat them?
Sirens are scary. Since Halloween is coming soon, no one would think any less of you for dressing up as one, Fentum.
Besides, Etheria is equal opportunity; there's no rule that says that all sirens are female, or that all sailors are male.
And I don't have the time, the money or the particular artistic skills necessary to make a Mage Wars costume. Some of them are quite detailed.