Hygiene is essential. Having good hygiene is the first step towards having good health, and while you should always have good cleanliness habits, this is especially important when it comes to sex and intimacy, as it helps prevent the spread of several sexually transmitted infections.
It is because the importance of good sexual hygiene habits can never be overestimated that we're talking about some of them today.
Urination helps clear out bacteria, but holding your urine can cause those bacteria to accumulate. Urinate whenever you feel an urge to and you'll have cleaner, healthier genitals.
Dirty underwear is unhygienic, and it can be an incubator for bacteria.
So you should avoid wearing dirty or sweaty underwear when at all possible.
For women, it is important to wash the genitals and then the anus, not the other way around. This sequence will help prevent cross-contamination from intestine bacteria and such.
Men should wash their genitals daily and dry them thoroughly every time they get in contact with water, a fortiori sweat. It is also good for men " and women too " to take a shower and clean their genitals before and after sex to reduce the possibility of spreading bacteria and infections.
Modern Western society looks at body hair rather disapprovingly, but we tend to forget that the fuzz has a purpose. Pubic hair, in particular, is meant to protect and warm the genitals, and is also said to collect pheromones, which help attract the other sex. On the other hand, not trimming pubic hairs can make it difficult and uncomfortable to have sex, not to mention they can grab on to bacteria and even fungi.
At the end of the day, shaving down there or not is still a matter of personal choice.
Even if you always use protection, have all the vaccines up-to-date, and get tested for STDs several times a year, it is still important to inspect your genitals regularly for any signs that something may be wrong. This will not only ensure you don't pass anything on to other people, but also that you may notice an illness at the earliest stages.
If you're a man whose penis has not been circumcised, you should take your time in the shower pulling back the skin to uncover the head and rinsing it with lukewarm water and soap. This will stop dead skin from building up and help avoid bacteria growth and infections.