Why do people visit a profile and never say a word? I know I do it, and its because i am usually told to go and see what a friend has said on someones profile, otherwise i'll either say hello or not visit at all. The other reasons i can think of are spying for a friend and trying to find out what 2 people are saying to each other or try and get you to visit their profile and rate them a 10.
Well the last one is a bit obvious and sad in my opinion. Just come out with it and ask if thats what you want. Spying on the other hand means you don't trust your friends. If they was stupid enough to leave sexual or romantic comments in public forum, then they deserve all the trouble they are going to get.