Should I let him touch my boobs?

we've been dating for 3months and I really want to go further than just kissing but i'm scared he might think I'm inappripriate , should I ask for more or at least let him get more comfortable? wouldn't he think I'm a little bit too thirsty? for both of us it's the first time to have a real relationship by the way.
Should I let him touch my boobs?
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