Don't go into intimacy dehydrated, stuffed from a huge meal, or loaded with alcohol.
A simple drink 1–2 hours beforehand can support hydration and give you some useful nutrients.
Try:
Watermelon + beetroot + ginger
Watermelon provides fluid and L-citrulline, while beetroot provides dietary nitrates that the body can convert into nitric oxide.
The goal isn't a magic “performance drink.”
It's giving your body hydration and nutrients that support normal blood flow.