the difference between my ring and index finger is huge!
ring finger being longer.
BUT, women tend to have the same characteristics in their hands due to the amount of estrogen present in their bodies and other conditions during conception. SO, men who have this same characteristic might be more physiologically similar to women, and be more naturally inclined to be attracted to men (on the basis of evolution) as most women are more inclined to be attracted to male in order for our species to survive and all that jazz. i know there are also a lot of lesbians out there too. but on the basis of evolution and sexual attraction, women and men tend to be attracted to those they would be able to procreate with.
but we humans are infinitely complex creatures, as is with all life. so who knows! science changes every day! 50 years from now we may find a new answer... and 50 years down the road from then discover we were wrong.