funbreaker

Esperanto. it’s not the statisically-average best lingua franca but it’s the best known that’s not tied to a single nation. Plus Hitler and Stalin both hated it.

Yeah, OP’s partner just straight up not being in the mood will be the bigger roadblock. Hard to be when you’re in pain/stuck with diarrhea/upset at everything/fatigued/ hangry/any of the above.

There’s no inherent risks (besides STIs but that’s a worry for sex in general), but she’ll have to remove any tampon or menstrual cup she’s using. https://www.healthline.com/health/womens-health/sex-during-periods You will also have to think about cleanup.