You could also be sent into a sex shop and ask to see a variety of dildos and vibrators, asking questions about them of the staff in there...

Masturbation in public toilets is also a common online assigned real time task.

Inserting dildos, butt plugs etc then a rope harness under clothes and walking round a public park or shopping centre. Bonus points for adding a vibrator that is on all the time you are walking... No one can see it but you know it is there and it does affect how you feel in public.