Conversations about intimacy often focus on preferences and chemistry, but the physical side of things matters just as much. A few small decisions before sex can influence comfort, safety, and overall experience more than people expect.

Jen Caudle, a board-certified family medicine physician who frequently shares health advice online, recently highlighted several habits worth avoiding beforehand. Her perspective is grounded in basic physiology rather than opinion, which makes the guidance practical rather than restrictive.

One of the more surprising points involves common allergy medications like diphenhydramine. These drugs—often used to relieve symptoms such as sneezing or itching—can also reduce moisture in different parts of the body. That includes vaginal lubrication. Since natural lubrication plays a key role in comfort during intercourse, reduced moisture can lead to irritation or discomfort. It doesn’t mean such medications are inherently harmful, but timing can matter if intimacy is planned.

Another issue she raised is shaving immediately before sex, particularly in sensitive areas. Freshly shaved skin is more vulnerable than it appears. Tiny micro-cuts, irritation, or razor burn can develop even if the skin looks smooth. Friction during intercourse can then aggravate that irritation, making the experience uncomfortable or even painful. Allowing some time between shaving and intimacy helps the skin recover and reduces that risk.

Alcohol is the third factor, and perhaps the most widely recognized. While a small amount may help some people relax, excessive drinking can interfere with physical responses and awareness. In men, it may affect performance; in women, it can reduce natural lubrication and sensitivity. Beyond physical effects, alcohol can also impact judgment and communication—both of which are essential for a positive and consensual experience.

Taken together, these points reflect a broader idea: preparation for intimacy isn’t complicated, but it benefits from awareness. Paying attention to how the body responds—whether to medications, grooming habits, or substances—can make a noticeable difference.

There’s also a quieter takeaway beneath all of this. Good experiences tend to come from comfort, communication, and timing rather than spontaneity alone. Small adjustments—like giving your skin time to heal, staying hydrated, or being mindful of what you consume—can help ensure that physical comfort matches emotional readiness.

In that sense, the advice isn’t about restrictions. It’s about removing avoidable discomfort so that intimacy feels natural rather than forced.