There are millions of things that you can do during sex besides fucking and getting fucked. Some of my favorite are below, and please comment with some of your favorite.
1) If you love CBT like I do, try some products like Icy Hot on the balls and possibly cock. You might want to have the sub bound and gagged because they will likely squirm and scream.
2) For those muscle/jock lovers out there that have some dumbbells at home, try using them as a restraint method. You can either lay them on top of the wrist/forearm while the sub is laying on a bed or if you have really heavy weights you could use rope and tie your sub to the weights.
3) Something I have really wanted to try, but haven’t been able to do yet is called Figging. Essentially you take a peeled piece of ginger and use it as a butt plug. If you try this, let me know. More Information

Clamps similar to this can be used for more intense nipple play. Find ones with a flat end.
4) Try to find every day products that can be used for kinky purposes. My BF found some large wood clamps he loves to have on his nipples. They provide a lot of pressure, but are still soft on the skin. Just take caution on which direction they go and don’t let them pull off unless you like blood-play.
5) Find a gag that you can still open the sub’s mouth some with. Once you’re done working them over and ready to blow your load, pry their mouth open and let the cum flow over the gag down into their mouth. They’ll then feel your cum slowly drip over the gag hitting their mouth. Let them just sit back and enjoy it for a bit.
Let me know what other things you enjoy doing, or any good implements of pleasure/pain.