HPV is usually transmitted through intimate sexual contact between partners. This may happen with rubbing the penis on the entrance of the vagina or the anus, or kissing the genitals or anus of a partner. You do not need penetration to transmit the infection. Some people wrongly think that not ejaculating in the vagina protects them from acquiring an STI. It is not the case. There are sufficient viruses for HPV transmission even when minimal skin-to-skin contact occurs. Condoms need to be worn for protection from the start of intercourse until the end.