What do you say or how do you react when people freak out about you shipping Wincest?

To be honest, I normally hide the fact that I'm a Wincest shipper outside this spot and certain other non-Fanpop places. But when I do admit it, I firstly point out the fact that it's fictional and the actors aren't related in real life. Then I point out the fact that slash incest is slightly less unacceptable - the whole reason incest is taboo is because of the increased risk of genetic defects, and gay pairings can't conceive (unless you're writing a mpreg fanfic).

I was just wondering if others react like I do, or give other reasons.