Is it normal that i want to fondle the tits of my co-worker?

I got a new job at a new office. There is one co-worker of mine that looks so sexy IMO and has wonderful full tits. She wears tight tee-shirts which emphasize her voluptuous figure.
I know I should have a strictly business attitude towards her but I can't help but thinking how would it be to feel those boobs of her. I know I won't but sometimes I feel like I'm going to lose control and just reach for her.
I'm looking at the faces of other male workers and they are very casual with her so I sometimes feel like I'm the only pervert in the office.