Hell no you're not crazy or a perv. I love downblouse shots. My wife gives them to me all the time and I get quite a few from the sis-in-laws from time to time (unintentional). I try not to stare too much, but, I can't help it, I love breasts!
Some of my co-workers give me shots too, again, unintentional, but very nice. One does it on purpose, I think.