2 quick questions

[naturegirlrocks.livejournal.com]

After reading and writing slash for little over two years now (yes, I guess I'm still a little of a n00b) there are two things that has caught my curiosity. I don't  know if it concerns H/D writing directly, but it I think it would really help me to understand the theme a little more. 

One: Do you think there are more bisexual men who are 'tops" than 'bottoms'? 
- I think that there are more tops because there is less threat to 'their manhood' (Y/N)
(I have a bunny about of exploring this question in a fic, so any help would be nice.)

Two: Why are there so many lesbian slash (man on man) writers? 
- I am more attracted by men than by women (about 80/20) so I can't really relate. I have asked lesbian writers this question before and they told me that 'it's just hot'. Maybe I'm just a little ignorant but why does women who don't find men desirable as sex partners write so darn good slash?

Or is it just because it is H/D and that it is meant to be<3?