I haven't seen much evidence that it's genetic. It could be but if it is, I've seen nothing to suggest that the genes are passed from gay people to their children. Straight people seem to pass it along. I'm not saying that it's a choice. The fact that many gay males have straight older brothers seems to indicate that whatever causes it is associated with second male pregnancies.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13