Couples are fun to watch if you have a good cam and can interact with them.
Make the person lose control the higher the tip the stronger and longer the vibrate.
Couples video chat services are incredibly useful tools for any relationship.
There are obvious advantages for couples that are long distance or away for long periods of time due to travel, but it can come in handy for other applications as well.
Be careful about paying a site that isn't well known.
They may just end up playing a video for you that looks live.