I think that the mirror image of what you are asking should be something to consider for all the people who are looking for ways to reignite the spark in their relationship.

I recently saw a TV show where a sexpert was brought in to help a couple to get their romance heated up again. The couple was two people in their early twenties. When I was that age I was so sexually aggressive, but I shied away from long term romances.
I figure that no matter the age people get bored of eating chocolate cake ever day.
As the saying goes, show me a gorgeous women and I'll show you a man who is tired of having sex with her. Sayings become sayings because there is truths in them.

That being said, the sexpert had the couple have sex every night for a week. They said that by the end of the week they felt more connected. I guess that if you stop having regular romance a wall goes up and then just getting past the wall is a chore. So how about next lent people give up not being romantic with their spouses. That is going to be an homework assignment next year for all of the FML married folks.

RD

That movie was based on a single man, and Lent is a Catholic thing. He was giving up a sin, while it may've been a sacrifice, it's not the point. You're supposed to do that everyday, whether it fits modern culture or not.

Giving up romance is another thing. I don't think it's the intent either. Suggestion is to give up acting loving towards another. Jesus may have asked his disciples to wait, he didn't ask them to go into the wilderness with him. Your sacrifice shouldn't be about giving up being loving to others, it should be about making a personal sacrifice. You and your partner may decide to give up the wine and rose petals during this time, but the joined commitment can in itself be romantic.

If you're asking if you should give up sex, I think you're not supposed to have sex on Good Friday, during the time of Jesus' suffering, but I've never remember any specific teaching related to this.