Two best friends get invited to a party that turns into an S&M party where they get spanked as well as have sex. What they don't know at first is that they had sex with each other while blindfolded.

The friends set up the guy who invited them to the party as well as the host who conducted the evening's activities.

Excerpt 

The phone rang, and when Mark answered it he recognized the lilting voice of his best friend. "Hello Mark, how ya doing?" Tad purred.

"Hello babe, I'm fine, you?"

"Great. Listen, you wanna go to a party tonight at a house owned by a friend of Eddie's? I understand the food and booze at this guy's parties are always great, and there'll be lots of hot guys there; whaddya you say? We haven't been out to a wild party in at least three months, and I need to get laid!"

"Okay, I don't have any plans. Can you drive though? I'm on painkillers for that tooth problem I'm having."

"Sure no problem, I'll pick you up at nine. Be ready!"

With that Tad hung up. Mark became excited about going out and began to think about what he would wear to the party. He usually just went out in black jeans, sneakers and a t-shirt of some kind and saw no reason to change for this party. He had nearly two hours before Tad would show up so Mark decided to take a long, hot bath before he got dressed.

As he sat in the tub he thought about how long it had been since he was with a guy or had a boyfriend. Work had just taken over his life and he rarely gave himself personal time to just have fun and relax. Maybe tonight would be the beginning of a new phase in his social life, he thought.

Tad was a longtime friend who went all the way back to high school. They had remained close friends but had never engaged in sex with each other, instead the two of them went out together to hook up, and usually had a blast doing it.