Hi dr, would event based prep give protection to insertive male having dry sex with condom and both had put underwear on(sex worker had touched wrong/inner side of condom before placing the fresh condom).no penetration at all. hiv risk?test required?

Highly unlikely: HIV transmission is highly unlikely in described scenario. HIV related anxiety is likely otherwise and you should discuss options with your PCP. No test and/or PrEP recommended for described contact.

See below: While this incidence does not pose a measurable risk of HIV, you general behaviour is a cause for concern and you should consider being on pre-exposure prophylaxis. Wish you good health!