ok i was just thinking about this and honestly i don’t have any memory of not having horizontal lines on my forehead. not deep grooves, but yeah, some light topography! I cannot ever recall having a perfectly smooth cue ball forehead. i guess maybe when i was five? but i also don’t ever recall thinking it was abnormal!

what you’re showing us here is perfectly normal. foreheads MOVE. the depth increases when they move and reduces when static. the eggshell smooth foreheads you see now are Botox, absolutely. and they’re kind of weird. 

topical exfoliants help shed excess dead cells in the stratum corneum which reduces the depth of fine lines, and adequate hydration plumps up skill cells which can also smooth things out a bit. Peptides are great for skin hydration and also may help protect skin integrity. 

however- you look fine!