I actually think that foreshadowing to an STD. I mean he got a condom and still went in raw. The Clap is calling.
He hasn't caught anything Pre-Episode 9, so he's safe from everyone there. However I think the obvious trap is set with Becky, as Derek said her pussy smells. It could be just her lack of hygiene but I did my basic research and got this:
"Sexually Transmitted Infections:
Sexually transmitted infections (STIs) like chlamydia, gonorrhea, and trichomoniasis can also cause vaginal odor and discharge. These infections are typically transmitted through sexual contact and require medical attention for diagnosis and treatment."
Since Becky 'gets around', it's likely that MC might be the unlucky recipient of an STD from her. Tara doesn't seem to be that promiscuous compared to others like Christie or Tiffany. And Derek doesn't really complain about anything regarding Tiffany's pussy, so it's likely she's safe.
I honestly believe Becky is going to be cause for something bad down the road. There's never been a more obvious trap than her in the entire game. Melanie, Riona, & Sarah? (Not counting Camilla since she doesn't do sex with anyone) They're professional sluts and they aren't exactly sleeping around 'that' often, just for restaurant business.