Don't drink and ...
And that, kids, is why you shouldn't give hickies.
"According to several studies, ejaculating frequently—during sex, masturbation, or while sleeping—can reduce men’s risk of prostate cancer. The study found that participants who reported ejaculating at least 21 times per month during their 20s were 19 percent less likely to develop prostate cancer than those who ejaculated seven times per month or less. "
While most sex-related injuries don't require a trip to the doctor, getting hurt in the heat of passion is a pretty common -- but seldom discussed ...
As much about being a considerate lover as it is about personal health
No means no. It's quite simple. There are no "but's" or "if's" about it.
Kegels aren't just for women.