Can Breast Fondling Affect The Shape And Size Of The Breasts?

Hello Doctor,
I am a girl aged 26 and have recently got married. I don't have any prior experience of any sexual activity. My husband likes to press and suck my breasts while we are having intercourse. I read it on the internet that pressing the breasts makes them bigger and lose their shape. And also that there are increased chances of developing breast cancer if they are pressed. Kindly counsel if it is completely safe to do the same and if it would not affect the shape and size of the breasts.
Thanks in advance,
Tanya