It is still questionable whether they like it or not until they do it in real life. Some realize that Do women love/like when men kiss or suck on their nipples/boobs?.
It's the suckle that dare not speak its name. In worldwide Google searches, “my husband wants me to breastfeed him” is a more popular search.
And lets be real, while we want our boobs to get attention, "When a guy sucks your boobs, and he's into it and romantic, it can be pleasurable.