1. Put depth on the table as a variable — before you're in bed
Ask her plainly whether deeper is something she enjoys at all — and make "not really my thing" a fully acceptable answer. If it matters to her, you're mapping preferences, not compensating for a defect.
Two things worth knowing going in. First, this reframing — depth as position variables rather than a size verdict — is our editorial stance, not a lab finding; no study has measured "perceived depth" against length. Second, what is measurable: most women already adjust depth and angle themselves — 87.5% in a national survey reported angling their pelvis to change where penetration rubs, and 84% used deliberately shallow touch for pleasure (Hensel 2021). You're joining an adjustment process she likely already does, not installing one.