@Tamerlane Not necessarily, but significant intoxication is one of the situations where you have to proceed with caution and make sure you ain't pressing anything that they didn't really want. (I.e. that they will regret afterwards.)
But as long as both parties are lucid enough to hold proper conversations that they will remember in the morning there shouldn't be an issue.
Still, starting out with a cup of tea and spending some talking time while sobering up just a little might be wise if there is an intent to have an ongoing relationship with them.
(At least with their current mood. If they had already been clearly intent on bodily connection then the mood might not allow for such frivolities until afterwards.)