Cybersex and Sex

Cybersex noun - Sexual arousal involving communication on the internet.

Sex and cybersex are semantically related In some cases you can replace term "Sex" with "Cybersex", this nouns are similar.

Sex noun - Sexual union involving penetration of the vagina by the penis.

Cybersex and sex are semantically related in lovemaking topic. Sometimes you can use "Cybersex" instead a noun "Sex".