Conversations about intimacy often focus on chemistry and preference, but physical factors also play a major role. Small choices made beforehand can affect comfort, safety, and the overall experience more than many people realize.

Jen Caudle, a board-certified family medicine physician who shares health guidance online, has pointed out several practical habits to be mindful of before intimacy. Her advice is based on basic physiology rather than opinion.

One example involves common allergy medications like diphenhydramine. While useful for symptoms like sneezing or itching, they can also reduce moisture in the body. This may include vaginal lubrication, which is important for comfort during sex.

Lower natural lubrication can sometimes lead to irritation or discomfort. This doesn’t mean the medication is unsafe, but timing may matter if intimacy is planned around its use.

Another factor is shaving right before sex, especially in sensitive areas. Freshly shaved skin can have tiny micro-irritations even if it looks smooth on the surface.

Friction during intercourse may worsen that irritation, sometimes causing burning or discomfort. Allowing time between shaving and intimacy gives the skin a chance to recover.

Alcohol is also commonly mentioned. While small amounts may help some people relax, higher amounts can affect physical response, sensitivity, and awareness in both men and women.

It can also influence judgment and communication, which are important for a safe and positive experience. Overall, these factors show how preparation can influence comfort.

The key takeaway is that intimacy benefits from awareness of the body’s condition. Medication timing, skin care habits, and substance use can all affect physical comfort.

Rather than restrictions, the goal is to reduce avoidable discomfort so intimacy feels more natural, safe, and comfortable for everyone involved.