Seven minutes in heaven is generally considered to be a teenage party game, but it can also be played by adults.
It does have a sexual twist, especially when adults decide to play after a few drinks and brought back memories from their teen years. Among teenagers it usually only involves some making out in a closet.
The basic idea is that two people are chosen and have to go into a closet(or some other closed dark space) for 7 minutes. They can do whatever they wish in that time. It's standard to chose different sex pairs to go into the closet, but you can go same sex as well if you want.