There is no part of life that cannot be represented in any one media which will inherently make the work it is represented in immediately worse.
That said, add something in gratuitously (I'm looking at you, Team Ninja), and it can seem tasteless. I am generally strongly turned off when I feel a piece of fiction is tasteless - I have never bought a game that had a supposedly "sexy" girl wearing practically nothing on the cover, and showed no gameplay to back it up.
This definition of "gratuitous stuff tends to be tasteless" isn't just about sex. Throw in needless violence, swearing, or pandering to any one audience or... Really anything else that just doesn't make sense or stand up on its own.