Male showing penis out genital slit.
Reference
Slooten E. (1994) Behavior of Hector’ s Dolphin: classifying behavior by sequence analysis. Journal of Mammalogy, 75.4, 956-964.
Genital rubs (on conspecifics).
Reference
Herzing D.L. & Johnson C.M. (1997) Interspecific interactions between Atlantic spotted dolphins (Stenella frontalis) and bottlenose dolphins (Tursiops truncatus) in the Bahamas, 1985-1995. Aquatic Mammals, 23.2, 85-99.
Penis inserted into blow hole/anus of other (male or female).
Reference
Ostman J.S.O. & Folkens P.A. (1996) A vocabulary to describe cetacean behavior. University of California, Santa Cruz pp.26.