Bisexuality and the "ex-gay" activist

I've always been interested in how anti-gay activists try to deal with bisexuality. Most of the time, they just don't mention it all. Here's a very quick example of why this might be necessary. In a discussion between"ex-gay" Kent Paris and LGBT-friendly evangelical Kathy Baldock (a.k.a. Canyonwalker), we get this brief exchange:

Canyonwalker: "Is it possible for me to change my natural attraction for a man to a woman?” 
Paris: “They do that in Hollywood all the time.” 
Canyonwalker: “Don’t you think that might be because they are bisexual?”
Paris: “There is no such thing as ‘bisexual.'"

Well I'm glad we cleared that up. Otherwise it might have led to awkward questions about how many" ex-gays" are actually bisexual people who've simply trained themselves to repress all sexual urges directed at the "wrong" gender. No way that an ex-gay political activist like Paris wants to get into that kind of murky territory.