Foray into qualified gender pigeonholing nothwithstanding, I agree with Cobra wholeheartedly about the benefits of exercise. Between the way I actually feel when I do it regularly and all the research out there about the massive physical and mental benefits, I just don't think it's something to brush aside lightly. It not necessarily fun for me still, in the sense that there are many things I would rather be doing. This makes it even harder to commit the time. But I have found that it DID get hugely easier after I suffered through maybe .... trying to remember ... three weeks? That sounds discouraging, but it isn't meant to ... I remember being so delighted when I realized it had become something that still took effort, but was definitely within my powers.
The reward in terms of confidence in myself and my body has been so worth it. I am not now and may never be stick figure girl, but no one but me can stop me from being strong -- and that sense of strength continues to pay off big time in every part of my life, including the bedroom.
If you still worry on some level about "wasting time" that could be better spent in productive and/or intellectual pursuits, you might think about getting an iPod or equivalent, if you don't have one. There is so much fascinating content that you can download now, not just music but radio shows and I'm sure lectures, books on tape, etc ... S. uses his workout time to catch up on his favorite radio show and thereby kills two birds with one stone.
"Show me a completely smooth operation and I'll show you someone who's covering mistakes. Real boats rock." -- Frank Herbert