The age gate asks visitors to confirm they are twenty-one or over before reading on, and on a couples booking both partners, not only the one writing, must be twenty-one or over.
This is a site for adults, and the line is twenty-one. The age gate is the bar that appears when you first arrive, asking you to confirm you are twenty-one or over before the site opens. On a couples site it carries a second meaning: it is not only the person holding the phone who has to meet it.
A couples booking puts two guests in the room, and everyone present during the session must be twenty-one or over. Neither partner can vouch for the other by clicking through; sending the booking message is the booking partner's statement that it is true of both of you. If one partner is younger, the evening cannot go ahead as a couples session. The same applies to friends travelling together who book a shared session.
A therapist may ask each of you to show photo identification when she arrives. She looks at it and hands it straight back. She does not copy, scan or photograph it, and nothing from it is written down. If she cannot satisfy herself that everyone in the room is twenty-one or over, she leaves before the session starts.
Everyone listed on this site is twenty-one or over, the same threshold every couple who books has to meet.
The gate is a statement you make by clicking, not an identity check. It sets the expectation before a single page is read, and it is repeated on the age verification page.
Being old enough is not the same as wanting to be there. A couples booking only works when both adults have chosen it. If one partner is planning a surprise, make sure the other would welcome it; the anniversary booking entry has more on surprises that go well.
Questions about the gate or about who can book are answered on the questions page.