This practice runs on consent, with pause and stop available at any moment to either partner. Where the giver finishes is the receiving partner's decision — agreed beforehand and honored in the act.
Named risks: gagging and vomiting are known reactions. Throat and mouth irritation can occur — oral-sex-associated lesions (palate bruising, redness, throat irritation) are documented in the medical literature as case reports; for severe injury there are only scattered case reports and no incidence data. The honest framing is uncertainty: persistent sore throat, pain, or any bleeding means seeing a clinician, not waiting it out.
STIs: the throat is an exposure site for oral sex, and throat infections are frequently symptomless. The risks are real but far from equal — per-act HIV risk via oral sex sits at the very low end of the spectrum, while other infections pass more readily. Condoms for oral sex are highly effective against fluid-borne STIs (gonorrhea, chlamydia, HIV) and only partially against skin-contact ones (herpes, HPV) — reduced risk, not complete protection. Two care triggers run in parallel: symptoms → a clinician now; no symptoms → periodic screening by exposure site, which beats waiting for symptoms to appear.
Don't do this now with an active throat infection or sore, or after recent throat injury or surgery. And if this act feels heavy because of past experiences — stop is a full sentence here too. Feeling triggered isn't an obstacle to overcome; a sex-positive therapist or counselor is a legitimate next step.