use html buttons with runat='server' attribute:
<input type="radio" id="male" name="group1" runat="server" />
<input type="radio" id="female" name="group1" runat="server" />
<input type="radio" id="in-between" name="group1" runat="server" />
To send it somewhere without using javascript or postback is almost impossible. My advice is learn javascript so that you can use the "onchange" attribute.