Welcome to the Forum.  Thanks for your questions.  I'll be glad to comment.  The encounters you describe were virtually no risk for STIs, including HIV.  Here is why I say this.  First, as places of business, most persons working in massage parlors who practice commercial sex do not have STIs- it's not only bad for their health (and they are aware of their risks) but it is bad for (repeat) business.  Further, the fact is most commercial sex workers are aware of their risks and get checked regularly.  Also, even in the unlikely possibility that one of your partners had another persons genital secretions on thier hands before they were with you- STIs, including HIV are not transmitted through this sort of contact- ever.   Finally, both anal fingering and receipt of a hand job are forms of masturbation which are no risk events.  That their hands passed over the tip of your penis does not  change that.  ---