One thing I want to tell you is that, you are sensitive about what your body touches and chances are so are they. If they are close enough to you to touch you with their body then it is probably okay to let it happen.

I am not saying to feel everybody up, I am just saying, for instance, in this picture his arms around their wastes would not be inappropriate. In fact it would make them all look better. Also, remember, to not put your arm around so much that you leave extra space, you want it to be something like this but keep your hand gently wrapped just above their hip. It's okay if they feel your fingertips. Read their body language, and judge based on the context of the situation. So, for instance Pictures, the end of dates that are going well, opening a door --done in passing, open said door and hold out your arm in a welcoming manner at about the height or a little above her hip and escort her in using the same part of the opposite hip from you as in the picture above a slight bow, NOT FULL BOW, you will look like a tool if you do a full bow-- are all good timing.

Bad timing, however, is if she/he has not gotten within arm's length of you and is now forced to be in line for a movie. If they are giving off an uncomfortable/bored/negative vibe. You can't force people to be close if they are having a bad time, it should all be organic.

It may take some trial and error, and there is a lot of fear to hurdle over I know, but, trust me, if you get this down, you will not regret it.

Remember touching is a form of physical nonverbal communication, if they are touching you in some way chances are they want to be touched back somehow. Learn to listen to more than their words, listen to their body language. Oh and read, read a lot. Read anything, the more you have bobbling around in your imagination the more you will have to talk about.

Good luck! You can message me if you have any questions. No ridicule.