Staging is super, but the script could have been finished in a more interesting way, for example, either the awakened girlfriend would have thrown the friends out into the street, or even joined them and looking at her friend obliquely would have screwed her boyfriend much cooler than a mulatto!
So let's say he found a whore and agreed to fuck her for money. Who doesn't, but why doesn't he protect himself? No matter how many times you explain to people the dangers of unprotected sex with a casual partner, they go at it again! Personally I always have condoms with me, women often have them too if they like sex!