People are getting hung up on the erectile dysfunction, but that isn't really the reason MC hadn't got any pussy. He will get it up when the time comes, don't worry guys lol.
After he got turned, he's basically been with Sharon the entire time. Getting some time to get some side chick pussy just wasn't there for him yet. First he is recovering, then learning, then busy with the court and task of atonement. He got cock blocked by the tight plot, rather than anything else. When they finally get around to trying to get his rocks off, he gets sent to hunters lol.
As for the main girls, Sharon seems very prude for a vampire (although this universe's vampires seem to deviate from the sexual beings that they are usually portrayed as), but it's a bit deeper than that. She is trying extra hard to preserve her humanity by reining in her urges. If she was human, she would actually have less blocks for engaging with a potential partner.
Laurie's pretty much been BFF with MC and was friendzoned. Now she is a thrall and it wouldn't sit right with MC to bang her at this stage. It would be like taking advantage of her.
This game just isn't the type to throw pussy at the MC for the sake of porn. It's gonna have to happen organically within the plot.
It was kind of a dick move (but so meta) to make us feed on dudes for the first meal though lol.
"Ok, you say the alley has hookers? Lets go there." Oh fuck its a homeless dude. Abort!
"Ok let's try the sneaking in. Probably some hot chick in there." Oh fuuuuck FAT BASTARD! Abort!
"Ok, surely the club will get us some club sluts." ....fuck it. At least this guy looks normal.