Edging, peaking, or surfing is a sexual technique whereby an orgasm is controlled. It is practiced alone or with a partner and involves the maintenance of a high level of sexual arousal for an extended period without reaching climax.

When practiced by males, direct sexual stimulation without the refractory period after orgasm is observed. When the controlled orgasm is achieved, the physical sensations are greater as compared to conventional orgasm. Orgasm control is referenced as "slow masturbation" in Alex Comfort's The New Joy of Sex (1993) and "extended massive orgasm" in Vera and Steve Bodansky's 2000 book of the same name. It is similar to the Venus Butterfly technique used in the volume The One Hour Orgasm (1988) by Leah and Bob Schwartz. Detailed practices including exercises can be found in several books, such as Mantak Chia's The Multi-Orgasmic Man.

Orgasm control involves either sex partner being in control of the other partner's orgasm, or a person delaying their own orgasm during sexual activity with a partner or by masturbation. Any method of sexual stimulation can be used to experience controlled orgasm.