The bait and switch is for those stubborn females, I have never had a male care what he was mounting. To bait and switch you simply place her with a male of the same species and wait and watch. When she finaly becomes receptive you pull the male before they lock up and place the intended male in. By then she wont care what it is. It doesnt always work out though, I left a female with a male mexican black and it must have turned violent after the mating. I saw them locked up and walked away only to find him very "girthy" 45 minutes later and no female. First time I actually had a snake eat another in 10+ years