Avoid eating Doritos before the meeting.
Risk of transmitting HIV through oral is exceedingly rare when a person’s immune system has a chance to do its job. Intact mucous membranes do a pretty great job. Additionally, if he is virally suppressed, oral is approaching zero risk for HIV. (I would say zero risk, but I’m sure a case report exists out there where someone got infected with open wounds in his or her mouth and a partner with an unsuppressed viral load)