For any academics on this board, you might find this interesting:
Sexual Arousal Patterns of Bisexual Men
Author(s): Gerulf Rieger, Meredith L. Chivers and J. Michael BaileyReviewed work(s):Source: Psychological Science, Vol. 16, No. 8 (Aug., 2005), pp. 579-584
Also I believe there was the Kinsey scale is what you're referring to http://en.wikipedia.org/wiki/Kinsey_scale
