Oral sex as a part of foreplay
"BJ" is an abbreviation for "blowjob," which refers to the act of performing oral sex on a male. Specifically, it involves using the mouth, lips, and sometimes the tongue, to stimulate the male's penis. It's a form of sexual activity that can be shared between partners as part of foreplay or as the main event. Like all forms of sexual activity, it's essential that it's consensual and that both parties are comfortable with the act. It can also be practiced safely by using barriers such as condoms to reduce the risk of sexually transmitted infections.