In the swinger community, I can understand your thought process. The swinging community has a lot of un-written rules and stigmas. In the swinger community there is a huge stigma about men being bisexual. If a woman is bisexual, then all is good, but if a man is bisexual, that is not acceptable, in the swinger community. This being the case, most swinger men, even the bisexual ones, are going to stay away from anything that might go against the un-written swinger code.
In the hotwife/cuckold community, cream pies are seen as gifts given to the wife or girlfriend that she can share with her husband or boyfriend, or another lover. To each his own, but I love having my husband go down on me after another man, or men, have cum in me.