Would any straight girls sleep with another woman to turn their man on?

I'm curious as to why many straight women say they would do something with another woman to please their man? Why do something that would repulse you and you have no attraction to. I'm biual so I get turned on by both. A the end of the day wouldn't you want to see your man with another man rather than you go with another women which cannot possible turn you on being straight and all? strange hey.