I too am wondering what aspects of this you think might be unhealthy. I can think of circumstances or reasons for doing it that could be unhealthy, but I don't think it is an unhealthy thing to do in itself at all.

I personally have photos of a former T. She gave me a couple year ago, and I have updated ones from her site on the net. I very fondly recall that T, and seeing her pics makes me smile. I look at her pics (usually by stumbling across them while looking for something else) maybe a couple of times a year. Nothing unhealthy goin' on there.