Press two fingers together—about 1.2" (30 mm). Start near that width, then move up by ~0.2" (5 mm) when entry feels effortless. Depth ≠ comfort; girth matters more for fullness.

Silicone dildos warm fast, flex slightly, and feel cushy at the entrance. Glass dildos stay ultra-smooth, hold hot/cold, and transmit pressure precisely to the G-spot with very little drag.

Yes—clean the surface with alcohol, press the base, then give a ¼-turn to expel air. Dry tile or a flat stool holds best; textured walls don’t.

Look for a flared or wide strap-on-ready base. Most O-ring harnesses take 1.75–2.0" rings; slimmer shafts need a smaller ring for a tight hold.

Only if the base is wide and flared. For back-door play, browse anal-safe dildos or start with a plug to warm up, then switch when the muscles relax.

Use the “ladder”: slow 20 s → pause 10 s → medium 15 s → pause。Change angles instead of only adding speed; let blood flow return between sets.

Yes. Insert 1–2″ and tilt the tip upward（toward the belly button）in small arcs. A gentle “full-but-good” pressure means you’re close—hold there and build rhythm.

Cowgirl keeps the angle steady; shower play with a suction-cup dildo frees hands. For pegging, a snug O-ring stops twist and wobble.