It would be interesting to know how many older brothers he has. (The present theory being that the greater the number of older brothers, the greater the chance a man will be gay. Something to do with maternal hormones in utero.)

I also wonder about the length of his fingers! (Or has that whole theory been debunked?)

"It has been suggested by some scientists that the ratio of two digits in particular, the 2nd (index finger) and 4th (ring finger), is affected by exposure to androgens e.g. testosterone while in the uterus and that this 2D:4D ratio can be considered a crude measure for prenatal androgen exposure, with lower 2D:4D ratios pointing to higher androgen exposure. The 2D:4D ratio is calculated dividing the length of the index finger of the right hand by the length of the ring finger. A longer index finger will result in a ratio higher than 1, while a longer ring finger will result in a ratio of less than 1.

The 2D:4D digit ratio is sexually dimorphic: in males, the second digit tends to be shorter than the fourth, and in females the second digit tends to be the same length or slightly longer than the fourth."

Taken from Wikipedia, but this is what I had always heard! I don't know if I believe it, but I use it works for me and is amusing. My ring finger is significantly longer than my point, allegedly indicating high levels of testosterone in utero which has been correlated with gayness.

Seems a little far-fetched, doesn't it? I personally file this alongside the big nose/big feet/big hands theory, palm reading, and phrenology.