I am a verified poster, trauma counseling. Sexual abuse can very much be a cycle and many perps were abused as children. I will link some literature for you.
http://bjp.rcpsych.org/cgi/content/abstract/179/6/482
http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(03)12466-X/fulltext
Here is a section from the below article:
"As suggested at the outset, sexual victimisation
is common in the experiences of many young
sexual abusers. A number of studies indicate that
between 30 and 70% of young abusers have been
sexually abused (Johnson &Shrier, 1987; Ryanef al,
1990). The impact of sexual abuse on the individual
is well documented (Watkins & Bentovim, 1992). It
is suggested that male children account for 25% of
all victims of sexual abuse (Rogers & Terry, 1984)
but there is considerable variation in the prevalence
figures presented in the literature. Petersef al (1986)
conclude that 3-31% of male children and adol
escents in clinically referred populations are
victims of sexual abuse, compared to 6-62% for
females. Furthermore, Finkelhor (1984) suggests
that in the general population between 2.5 and 8.7%
of males have been sexually abused at some time."
http://apt.rcpsych.org/cgi/reprint/4/2/101.pdf