Should I put my thumb inside my girl's mouth before I kiss her?

Before we make out, I usually caress her lips with my thumb and it turns her on so much, and I love it too, but I've recently seen a lot of posts about how he guy puts his whole finger inside her mouth , does that have any stronger feeling or something? I don't want anything myself , I just want to pleasure her to the most , and if putting my thumb inside her mouth instead of just caressing her lips I'd totally do it.
Should I put my thumb inside my girl's mouth before I kiss her?
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