Packing in this context, is a slang term for wearing a strap on dildo. To go out while wearing one can give a woman an intense window into what it might feel like to walk the streets, check out chicks or dudes, while managing a raging hard-on. It can be an incredible turn-on.
Some women might really like this because it is an added challenge to trying to pass. If this is something they’re interested in, women have to pay a great deal of attention to manner of walking, sitting, and standing. Not everyone fits a stereotype, but certain sitting positions and ways of holding the body in space tend to belong to either the male or the female realms. A woman can study videos of men she admires or even take some cross-dressing instruction to get good at it.

Mannerisms are important, but so are the clothes. A large-breasted woman will need to take some time figuring out how best to mask the boobs. Taping works for most, and can best be learned from another drag king if possible. Then, there’s the cock. Adding that to the mix may change the choice of clothing. It may be nice to have a little bulge. Unless the exercise is purely for exhibitionist purposes. She may want to find a way to make it a little more subtle than looking like a pitched tent.

A few crossdressing women, especially if they like to do it for the stage, would like everyone to see that big bulge. For most, just the feeling of knowing that she has something a little extra between her legs is what the excitement is all about. Bonus fun: Out at the bar, she might brush against her lover, who will suddenly know what’s in store for playtime that night.

A simple internet search will turn up plenty of fun erotic vids that can teach you everything from how to take it in the ass to how to give a killer blow job and beyond. Take a look for just about anything you want to learn about, and chances are someone has published something with your particular taste in mind.

The good thing about these instructional videos is the balance they usually manage to strike between informational and just plain sexy. You are likely to find an attractive narrator interspersed between the rest of the action. There may also be a doctor or other informed individual to explain some of the more important points on health and safety. Then comes the fun part: a hot couple there to demonstrate a good example of the topic of the video. There will likely be some voiceover to explain some details of the action, but there’ll be no mistaking the hot, explicit sex that will ensue based on the instruction.

Suppose you are a couple that wants to explore flipping the anal sex around and giving him some. A video of this type will have someone begin to explain how she will need to purchase a strap-on dildo, how they work, and the sizes and styles the couple can choose from. There will be a lot of guidance along the way in terms of how to use the toy, with some cautions: The video will want to make sure lots of lube is used, that they take their time, and that the dildo has a flared base so it won’t get stuck. Once they get going, it’ll be full-on fun. There will be a long sex scene so you not only learn, but have ample time to jack off watching.