Outdoor Suck-Off is competent shelf filler, but nothing earth-shattering.
Fucking seems to get much more airtime than the sucking does, which is not a problem, unless due to the title, the viewer expects to get a major focus on oral indulgence. Two pairings bookend a foursome, which is the only scene to generate any heat. Another misleading bit of advertising is the box copy which stresses the outdoor sex. While it is true that sunlight is the light source, the "outdoors" is limited to a patio with lawn furniture - not exactly the image that comes to mind when one thinks of sex in the great outdoors.