Why a guy press his chest on my breast when hugging?

I have a guy friend, but we are more likely to be brother and sister. I dont get it why he hugs me so tightly till his chest touches my breast, even when I gave him a soft hug, he will wrap his arms around me so tightly which makes me to feel that he's doing it purposely. This doesn't happened only once but everyday when he offer me a hug. Note: He's a nice guy who is very protective about girls and a person who respect girls. We are in our 20's.
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+1 y
Sorry for the confusion. What i meant was i hug him in a way where my breast will not touch his chest. Sorry, im not good in explaining things out.
Why a guy press his chest on my breast when hugging?
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