Genital herpes is primarily transmitted through sexual contact, such as vaginal, anal, or oral sex with an infected person. While it's less common than other modes of transmission like direct skin-to-skin contact during sexual activity when there are sores present.

Kissing can potentially lead to the spread of genital herpes if one partner has a cold sore (oral herpes) and engages in kissing while experiencing active symptoms. The virus responsible for cold sores (herpes simplex virus type 1 - HSV-1) can be transmitted to the genital area through oral-genital contact.

It's essential always to practice safe behaviors and communicate openly with your partners about STD status before engaging in any intimate activities. If you have concerns or suspect exposure to genital herpes or any other sexually transmitted infection, consider consulting healthcare professionals for testing and guidance on prevention measures.