You have a lot of men in denial about their sexuality, so they want to "expand" the definition of heterosexual. It's the Malik Yoba syndrome (who BTW said this very same thing). The problem I have with these men is not their attraction to transwomen (males), but their need to bring other real heterosexual males into their mess & stand under the heterosexual "umbrella", when they're clearly anything but. This is why SuperStraight was started by a teen & other straight men of various ages rallied around it. If you want to expand the definition of heterosexual, gay, & lesbian; don't be surprised when those of us who understand how sex works in real life, come up with new definitions for our sexuality, that is based strictly on biological sex.