This paper describes a set of adult male monozygotic twins concordant for homosexuality. When initially seen they were living together in a highly ambivalent incestual relationship. Both were dysfunctional sexually (impotent) outside the twinship. Individual and conjoint therapy has assisted each of them with separation and the establishment of more appropriate and sexually functional love relationships.
References
1.
DavisonK., BrierleyH., SmithC.A male monozygotic twinship discordant for homosexuality.Br J Psychiatry1971; 118: 675–82.
2.
GreenR., StrollerR.J.Two monozygotic (identical) twin pairs discordant for gender identity.Arch Sex Behav1971; 1: 321–7.
3.
HestonL.L., ShieldsJ.Homosexuality in twins.Arch Gen Psychiatry1968; 18: 149–60.
4.
KlintworthG.K.A pair of male monozygotic twins discordant for homosexuality.J Nerv Ment Dis1962; 135: 113–25.
5.
MesnikoffA.M., RainerJ.D., KolbL.C.Intrafamilial determinants of divergent sexual behaviour in twins.Am J Psychiatry1963; 119: 732–8.
6.
ParkerN.Homosexuality in twins: a report on three discordant pairs.Br J Psychiatry1964; 110: 489–95.
7.
RainerJ.D., MesnikoffA., KolbL.C.Homosexuality and heterosexuality in identical twins.Psychosom Med1960; 22: 251–9.
8.
ZugerB.Monozygotic twins discordant for homosexuality: report of a pair and significance of the phenomenon.Compr Psychiatry1976; 17: 661–9.
9.
CroninH.J.An analysis of the neuroses of identical twins.Psychoanal Rev1933; 20: 375–87.
10.
KallmannF.J.Comparative twin study on the genetic aspects of male homosexuality.J Nerv Ment Dis1952; 115: 283–95.
11.
Ibid No. (7) discussion by F.J. Kallmann, p. 258–9.
12.
JosephE.D., TaborJ.H.The simultaneous analysis of a pair of identical twins and the twinning reaction.Psychoanal Study Child1961; 16: 275–99.
13.
HoldenH.M.Psychotherapy of a shared syndrome in identical twins.Br J Psychiatry1965; 111: 859–64.
14.
PardesH., StinbergJ., SimonsR.C.A rare case of overt and mutual homosexuality in female identical twins.Psychiatr Q1967; 41: 108–33.
15.
PerkinsM.W.Homosexuality in female monozygotic twins.Behav Genetics1973; 3: 387–88.
16.
ZazzoR.Genesis and peculiarities of the personality of twins. In: Twin research: psychology and methodology. Part A. Edited by NanceW.E.. New York: Alan R. Liss, Inc., 1978: 8.
17.
PalusznyM., Beit-HallahmiB.An assessment of monozygotic twin relationships by the semantic differential.Arch Gen Psychiatry1974; 31: 110–12.
18.
ScheinfeldA.Twins and supertwins.Philadelphia: J.B. Lippincott,1967: 226.
19.
RaceR.R., SangerR.Blood groups in man, sixth ed., Oxford-London Edinburgh and Melbourne: Blackwell Scientific Publications, 1975.
20.
CohenD.J., DibbleE., GraweJ.M.Separating identical from fraternal twins.Arch Gen Psychiatry1973; 29: 465–9.
21.
MahlerM.On the first three subphases of the separation-individuation process.Int J Psychoanal1972; 53: 333–8.
22.
LeonardM.R.Problems in identification and ego development in twins.Psychoanal Study Child1961; 16: 300–20.
23.
ArlowJ.A.Fantasy systems in twins.Psychoanal Q1960; 29: 175–99.
24.
BurlinghamD.T.Twins: observations of environmental influences on their development.Psychoanal Study Child1946; 2: 61–73.
25.
BurlinghamD.T.The relationship of twins to each other.Psychoanal Study Child1949; 3/4: 57–72.
26.
BurlinghamD.T., BarronA.T.A study of identical twins.Psychoanal Study Child1963; 18: 367–423.
27.
LassersE., NordanR.Separation-individuation of an identical twin.Adolesc Psychiatry1978; 6: 469–79.
28.
SiemonM.The separation-individuation process in adult twins.Am J Psychother1980; 34: 387–400.
29.
WinestineM.C.Twinship and psychological differentiation.J Child Psychiatry1969; 8: 436–55.
30.
RaybinJ.B.Homosexual incest.J Nerv Ment Dis1969; 148: 105–10.
31.
WestermeyerJ.Incest in psychiatric practice: a description of patients and incestuous relationships.J Clin Psychiatry1978; 39: 643–8.
32.
FinkelhorD.Sex among siblings: a survey on prevalence, variety and effects.Arch Sex Behav1980; 9: 171–94.
33.
SlaterE.Birth order and maternal age of homosexuals.The Lancet1962; 69–71, January 13.
34.
SlaterE.The sibs and children of homosexuals. In: SmithD.R., DavisonW.M. eds. Symposium on nuclear sex.London, 1958.
35.
TaylorC.C.Marriages of twins to twins.Acta Genet Med Gemellol1971; 20: 96–113.
36.
KaplanH.S.The new sex therapy.New York: Brunner/Mazel, 1974.
37.
MastersW.H., JohnsonV.E.Human sexual inadequacy.Boston: Little, Brown1970.
38.
McWhirterD.P., MattisonA.M.The treatment of sexual dysfunction in gay male couples.J Sex Marital Ther1978; 4: 213–8.
39.
MyersM.F.Retarded ejaculation in homosexual patients. Paper presented at the Canadian Psychiatric Association Meeting, Toronto, October 1980.
