If you have never or rarely ridden before, the rider should go through a number of details with you. He should show you how to get on and off the motorcycle. This should include whether he wants you to get on first (usually not, but more common on big bikes with passenger backrests), whether he expects you use the passenger peg as a step or simply throw your leg over the seat (let him know if you can't do this), which side you will approach from, whether you can use his shoulders or arm to steady yourself, and most importantly, how to confirm that he is ready for you to mount. If you catch him by surprise, you could cause the bike to fall over. When the ride is over, will you get off first or will he? Which side and will you use the footrest as a step? He should warn you about any hot parts, normally the exhaust system, to avoid touching.