Please be a troll post, but in case it's not: once a TD has dried completely, it should be fine for someone else to touch the area, but personally I would avoid prolonged contact when possible. As for oral sex . . . Just don't put TD's on your ding-dong? I would guess it would be higher risk as you'd be putting the medication directly into someone else's body instead of just some small amount getting on their skin without a carrier.