Why? Ill never understand

Has any male or female noticed the opposite sex is attracted to you more when you're in a relationship?

Example: me and my fiance have been together 2 years, with only a three week split. Well during the year and a half before the split I had guys constantly hitting on me trying to get me to break up with him but I never did. When we split up for those three weeks due to me not being able to handle a lot of pressure coming from some family issues, no one, I repeat no one hit on me. At all. Hell no guy looked my way. When we got back together it started all over again guys hitting on me.

Like today I had a guy tell me it was no bra day today and to show him I was celebrating. I told him to shove it then proceeded yo delete and block him.

Anyone else have this? Or notice this happens? I find it hilarious and it constantly makes me laugh at the ridiculousnesss.