I'd have phone sex. Trouble is, no one is calling.
I actually went through a phase of phone sex calls when I was 17. I called this one line more frequently than others. 1-800-GOOD-FUCK.
It was essentially two women on an open party line. I assume they would know when people came on the line. They would try to engage you immediately, but you didn't they would just "play" with themselves. I admit it was hot to listen to, but I have no skills in sexy talk. I fuck a lot better than I talk. Besides when the guys who would step up and chat, it always ended with me stifling laughter when they would come while on the phone. The yells and hollers were usually quite exaggerated.
But I really got off on the foreign sex lines, be it Spanish or Portuguese. They could be reading from stereo instruction, but damn it sounded hot.