Yes, by and large girls it when their boobs are caressed and sucked during sex. It is an erogenous zone in a girl's body and caressing it well arouses a girl for sex. Since humans and dolphins are the only 2 species that copulate for pleasure apart from producing babies, boobs act as a pleasure point for both man and woman. For some girl's its hard to orgasm if their boobs are not sucked properly and hard. But there are also girls who reject the idea of sucking boobs during sex. So, it is a personal preference and may differ from person to person.