You can be intense in sex and you may not be sincere, because sex is not necessarily love. You may be very, very intense in your sexuality -- but once sexuality is fulfilled, it is finished, the intensity gone. Love may not look so intense, but it is sincere -- and because it is sincere, the intensity continues. In fact, if you are really in love it becomes a timelessness. It is always intense. And make a clear distinction: if you are intense without sincerity, you cannot be forever intense. Only momentarily you can be intense; when the desire arises you are intense. It is not really your intensity. It is enforced by the desire.

Osho