Gay Men in Monogamous Relationships Were Able to Have Extradyadic

Gay men in monogamous relationships were able to have extradyadic sex because:

A) they told their partners and made an "open relationship agreement"
B) they convinced themselves of "emotional monogamy"
C) they always used a condom with the person they had an affair with, but did not use a condom with the love partner
D) they drank enough alcohol so that they did not feel responsible