HA!
In your FACE, Leon! [j/k
]
I've more or less believed this for a long time, although I think that some of this is more to do with Social pressures than Biology (e.g. the problems assessing risk is much to do with the way boys are brought up, probably). I find it amusing trying to think of the way various blokes will react to this news...
"I'm not soft! Hard as nails, me..."
"I can't do the washing up, I'm more biologically vulnerable than you..."
Hmm. Well, at least men have finally got a retort for when women use the Period/Childbirth Card...