A strapless strap-on has an inner bulb that stays in the wearer’s vagina and an outer shaft for a partner. Muscle tone and a slight squeeze hold the toy. There is no belt, which looks sleek and can feel precarious.

These toys work best with a wearer who can keep a steady clench and a partner who does not thrust like they are splitting firewood. A first session often includes the inner bulb slipping out and both people laughing. A snug inner flare and a flexible middle help more than bravado.

Some users still add a light harness as backup. That is not failure; that is how the toy becomes usable for longer. Lube the inner bulb lightly so it does not skate, and the outer shaft more generously.

Making it stay

• Insert and clench before anyone else moves.
• Choose positions with less in-and-out travel at first.
• A toy that is too heavy for the inner bulb will peel out.
• Wash both ends; they had different jobs.