There's something about British Columbia

I'm in Canada today so had the chance to peruse The Globe and Mail. Came across this counterintuitive story (Gays, lesbians more likely to become teen parents, B.C. study says)

Sexually active gay, lesbian and bisexual teenagers in British Columbia are up to three times more likely to be involved in a pregnancy than their heterosexual counterparts, according to a University of British Columbia study.Although the study did not go into why the pregnancies occurred, principal investigator Elizabeth Saewyc said one possible reason young gays and lesbians may become involved in pregnancy is negative messages they receive about their sexuality from society."Young people may try to avoid that stigma by reaching for an identity they can be proud of. In Canada, we have very positive things to say about motherhood and fatherhood," Dr. Saewyc said.

I don't buy that explanation.