Wife gave me a massage and I cried

Title says most of it. I was sore after a weekend vacation to a theme park, and today during my lunch break my wife started giving me a full body massage. I'd never had one before and it felt equal parts tickling and relieving.

When she had me turn over to do my chest, I had my eyes closed and she was just sort of rubbing my chest and shoulders. It brought back sensations of being a little kid and having my mom or dad tickle me on the floor. I couldn't hold back the tears and she noticed. I haven't explained it to her, but I told her thank you and I love her for it.

This just happened and she's gone out to get us lunch. Aside from feeling a little embarrassed for crying.... I realize how amazing my wife is, and I need to treat her to something special.

Not really sure how to explain to her why I cried.