Legally, an intoxicated person who is impaired to the point of black out is unable to give consent for sexual activity, so technically, this can be considered rape. From a practical standpoint, you are unable to give any history of what happened, so it is your friend's word against your lack of memory, and there is no way to legally prove your impairment due to alcohol ingestion, so it is rare for a case like this to be prosecuted successfully due to the lack of witnesses (unless someone else who was not impaired can testify to your state of intoxication and that you were coerced or forced to have oral sex).

From the standpoint of your personal health after an incident like this, you should be concerned about possible STD exposures from fellatio, and should be seen in the Student Health Center next week when we reopen to discuss the screening we would recommend. We also strongly urge that you avoid future heavy drinking episodes (i.e. more than 4 drinks per setting) so you are not at risk of future injury or illness or unwanted sexual activity.