Have sex outside.
Have sex in a car.
Dress up as something tiresomely predictable (French Maid, Nun, Tellytubby, etc.)
Massage your man with sensual oils from these undeclared advertising partners.
Insert an entire ham into his rectum.
Ah Cosmo, I'd recognize you anywhere.
Although, to be honest, most of that isn't terrible advice. Just... bland.
Sex outside - make sure the planned location is A) flat, B) an appropriate temperature, C) sheltered, D) that you have something large and soft (like a thick quilt) to lay out on the ground first. It can be romantic... not sure it really hits "hot" but whatever.
Sex in a car - probably not full sex (again, unless you have a limo or a creepy van) but hand-jobs, oral sex, etc all works pretty well. Also make-outs if you're going old-school.
Dress Up - yes, they usually are tiresomely predictable. However, they don't HAVE to be. Having done some cos-play at Anime cons... those outfits often work VERY well for this sort of thing. ^^
Massage - this one works very well. Just make sure to keep the pressure light unless specifically asked otherwise. Also, massage oil makes great hand-job lube. Better yet, use the KY massage lube so that it won't eat through any condoms you might be using (which some massage oils might do).
Insert object into butt - actually, this works REALLY well. So long as the guy is relaxed, and you have plenty of that KY massage oil lube, and the object is a proper anal toy designed for that purpose, then the results can be VERY impressive. Like, really, really impressive. ^^ However, do NOT attempt with random objects or without lube.
And I can throw a few more out there...
Clubbing Corset - That is, a corset for clubbing. They don't have any boning, so they are WAY more comfortable, but they LOOK really hot.
Light bondage - Get some of those velcro straps and let him tie you up. It's velcro, so you can get out at any time, but it feels very kinky, and may appeal to his fantasies.
Public Sex - not outside, but in some slightly risky indoor location. Go to a movie that's been out a week or two already and isn't that popular. Sit far away from anyone else there, and try to avoid obvious spots (never try the back row, the ushers check there). Also, avoid full sex - stick with hand-jobs and oral. Full sex is too noisy, obvious, and honestly movie theaters aren't that clean so the more clothing that stays on the better. However, exchanging hand-jobs has almost no risk of touching any sensitive parts to the theater, is fairly quiet, and doesn't require anyone leaving their seat or doing anything particularly suspect. And, from a distance, you just look like you're holding hands or maybe making out - totally legal at a theater.
Another popular location are college libraries. They are often multi-story, not well patrolled, and there is little-to-no-chance of being caught by a 10 year old.
Roleplaying - Sure, you can do the stupid porn scenarios, but I prefer the nerdier version. See, I play D&D (well Pathfinder, but whatever) and so does my spouse. We often play together. And our characters often become involved. So... after the game, when we're home, our 'characters' can spend a night together. VERY sexy. ^^
Oh, and we once did this with our Dragon Age characters (ie, we pretended to be them). And our Skyrim characters. Also, it turns out I do a very good Tali voice... ... you get the idea.
Guest Stars - If you're very comfortable in your relationship, you can invite extra players to the bedroom. If you're worried about a three-way being awkward, consider swinging with another couple. "Soft swinging" doesn't involve full sex, just foreplay and voyeurism (ie, sex and a live show for both couples). If everyone has a good time, then you can meet again.. perhaps work up to "full swing" (everyone has sex) if everything goes well. However, it's important to make sure everyone is one the same page when you set things up. What are the rules - who can touch whom (some guys get upset about the idea of their 'junk' touching, whereas others enjoy a good double penetration).
Wow, I could write a whole column on this myself, couldn't I? Well, I have read a lot of Cosmo (and Vogue) so I guess I know the style.