Use your teeth.
Part of the reason genitals create such special sensations is because they are highly sensitive. This means that actions that don't seem all that forceful elsewhere, like nibbling, can feel much rougher down there. "When it comes to teeth on genitals, simply don't do it without asking permission [and] whether they're into it," says Malone. Encourage your partner to give some feedback about the pressure they like; consider negotiating tapping or squeezing hand signals in advance.